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    #41
    Re: Here is a good used source for 18650 batteries

    No I have not but would definitely would want to see how they are made
    9 PC LCD Monitor
    6 LCD Flat Screen TV
    30 Desk Top Switching Power Supply
    10 Battery Charger Switching Power Supply for Power Tool
    6 18v Lithium Battery Power Boards for Tool Battery Packs
    1 XBox 360 Switching Power Supply and M Board
    25 Servo Drives 220/460 3 Phase
    6 De-soldering Station Switching Power Supply 1 Power Supply
    1 Dell Mother Board
    15 Computer Power Supply
    1 HP Printer Supply & Control Board * lighting finished it *


    These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

    1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
    2 Hem Saw Computer Stack Board

    All of these had CAPs POOF
    All of the mosfet that are taken out by bad caps

    Comment


      #42
      Re: Here is a good used source for 18650 batteries

      Here is an update on the testing of these batteries

      https://batteryhookup.com/products/3...cells-with-pcb

      Most of what I have tested so far most of them are testing around 22**milliamperes hours **something there have been a very few that have tested below 2000 milliamperes hours
      ( and some that tested above 2000 milliamperes hours )
      ( I have tested about half the first set of 30 that I first bought

      I have bought a 100 more of them because of the testing I have done so far I need to fill 3 battery pack holders that take 27 batteries each

      Well worth the money

      I am going to buy the battery powered air compressor that I will post a link to later I going to build a battery pack for this compressor because the reviews I have seen about it complain about the battery packs not lasting very long
      Last edited by sam_sam_sam; 07-30-2021, 06:26 AM.
      9 PC LCD Monitor
      6 LCD Flat Screen TV
      30 Desk Top Switching Power Supply
      10 Battery Charger Switching Power Supply for Power Tool
      6 18v Lithium Battery Power Boards for Tool Battery Packs
      1 XBox 360 Switching Power Supply and M Board
      25 Servo Drives 220/460 3 Phase
      6 De-soldering Station Switching Power Supply 1 Power Supply
      1 Dell Mother Board
      15 Computer Power Supply
      1 HP Printer Supply & Control Board * lighting finished it *


      These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

      1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
      2 Hem Saw Computer Stack Board

      All of these had CAPs POOF
      All of the mosfet that are taken out by bad caps

      Comment


        #43
        Re: Here is a good used source for 18650 batteries

        Ok here we go again with the quality of Harbor Freight new lineup of tools that is not all its seem it the quality of the battery pack the batteries are made with some off brand that I seen before I did buy the battery operated compressor which the reviews are good as far as the compressor was concerned but the biggest complaint issue is that the batteries are crap which after opening the battery pack I can understand why

        ( one note these battery packs are cheaper in price than the other brand lineup that I talked about earlier in this post at lest it used LG brand it might have been the lower end of there brand but the battery pack have good results there is a protection board in the battery pack and the charger does maintain the battery voltage when it goes a little low but does turn off the charging mode when finish )

        I going to use the battery pack case to hookup with the battery pack case that I have talked about earlier that uses the 27 batteries and only put 25 batteries in it

        The battery charger I have not taken it apart yet but in this case I will open it up and see how this is put together

        One thing I have noticed with this battery pack there does not seem to be a battery balancing protection board which is a disconcerting to me that you would make something that does not have a protection board or I can not see any components on top of the board unless it is on the bottom of the board which I can not see until I remove the battery from the battery holder one thing I did see is some type of temperature sensor in between the battery cells which is a plus

        ( one note I only bought two of the 1.5 amp hour battery packs not the 5 amp hour battery pack that there was not as many complaints about and in all fairness I will buy a 5 amp hour battery pack later on and open it up and see what type batteries are in this battery pack )

        More to come later

        I will post the brand of lineup when I have all the information about the batteries and if the batteries have a protection board the information about the battery charger and so on
        Last edited by sam_sam_sam; 07-30-2021, 09:09 PM.
        9 PC LCD Monitor
        6 LCD Flat Screen TV
        30 Desk Top Switching Power Supply
        10 Battery Charger Switching Power Supply for Power Tool
        6 18v Lithium Battery Power Boards for Tool Battery Packs
        1 XBox 360 Switching Power Supply and M Board
        25 Servo Drives 220/460 3 Phase
        6 De-soldering Station Switching Power Supply 1 Power Supply
        1 Dell Mother Board
        15 Computer Power Supply
        1 HP Printer Supply & Control Board * lighting finished it *


        These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

        1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
        2 Hem Saw Computer Stack Board

        All of these had CAPs POOF
        All of the mosfet that are taken out by bad caps

        Comment


          #44
          Re: Here is a good used source for 18650 batteries

          Here is the more
          Just as I thought the BMS balancing protection board is part of the charging board look at the top and bottom of this board I have never seen this before done like this

          I like the idea that you can use the battery connector in another case if you want to
          Attached Files
          Last edited by sam_sam_sam; 07-31-2021, 06:51 PM.
          9 PC LCD Monitor
          6 LCD Flat Screen TV
          30 Desk Top Switching Power Supply
          10 Battery Charger Switching Power Supply for Power Tool
          6 18v Lithium Battery Power Boards for Tool Battery Packs
          1 XBox 360 Switching Power Supply and M Board
          25 Servo Drives 220/460 3 Phase
          6 De-soldering Station Switching Power Supply 1 Power Supply
          1 Dell Mother Board
          15 Computer Power Supply
          1 HP Printer Supply & Control Board * lighting finished it *


          These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

          1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
          2 Hem Saw Computer Stack Board

          All of these had CAPs POOF
          All of the mosfet that are taken out by bad caps

          Comment


            #45
            Re: Here is a good used source for 18650 batteries

            I will show more pictures tomorrow about the batteries used I thought I might have seen this brand before but I have not I do not know if I like the idea that they put BMS balancing protection board in as part of the charging controller board hun maybe a good idea maybe not
            9 PC LCD Monitor
            6 LCD Flat Screen TV
            30 Desk Top Switching Power Supply
            10 Battery Charger Switching Power Supply for Power Tool
            6 18v Lithium Battery Power Boards for Tool Battery Packs
            1 XBox 360 Switching Power Supply and M Board
            25 Servo Drives 220/460 3 Phase
            6 De-soldering Station Switching Power Supply 1 Power Supply
            1 Dell Mother Board
            15 Computer Power Supply
            1 HP Printer Supply & Control Board * lighting finished it *


            These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

            1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
            2 Hem Saw Computer Stack Board

            All of these had CAPs POOF
            All of the mosfet that are taken out by bad caps

            Comment


              #46
              Re: Here is a good used source for 18650 batteries

              balancing is only used for charging anyway, protection is most needed for discharge and only minor for charging (charger can handle overcharge).

              Comment


                #47
                Re: Here is a good used source for 18650 batteries

                Originally posted by eccerr0r View Post
                balancing is only used for charging anyway, protection is most needed for discharge and only minor for charging (charger can handle overcharge).
                So now the question is do the tools have the protection board to keep the batteries from becoming over discharged
                9 PC LCD Monitor
                6 LCD Flat Screen TV
                30 Desk Top Switching Power Supply
                10 Battery Charger Switching Power Supply for Power Tool
                6 18v Lithium Battery Power Boards for Tool Battery Packs
                1 XBox 360 Switching Power Supply and M Board
                25 Servo Drives 220/460 3 Phase
                6 De-soldering Station Switching Power Supply 1 Power Supply
                1 Dell Mother Board
                15 Computer Power Supply
                1 HP Printer Supply & Control Board * lighting finished it *


                These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                2 Hem Saw Computer Stack Board

                All of these had CAPs POOF
                All of the mosfet that are taken out by bad caps

                Comment


                  #48
                  Re: Here is a good used source for 18650 batteries

                  I guess I have to buy a tool and see if there is a protection board for the battery pack because there is none in the battery pack

                  This might be one reason the cost ( plus the fact that they used non brand name batteries in these battery packs ) of the battery pack are less but the tools cost a little bit more money than the other brand lineup that I mentioned earlier in this post

                  But because the BMS balancing protection board is part of the charger it going to make the modification to the battery pack that I have in mind a lot easier and the battery pack could also be used in other devices
                  Last edited by sam_sam_sam; 08-01-2021, 01:58 AM.
                  9 PC LCD Monitor
                  6 LCD Flat Screen TV
                  30 Desk Top Switching Power Supply
                  10 Battery Charger Switching Power Supply for Power Tool
                  6 18v Lithium Battery Power Boards for Tool Battery Packs
                  1 XBox 360 Switching Power Supply and M Board
                  25 Servo Drives 220/460 3 Phase
                  6 De-soldering Station Switching Power Supply 1 Power Supply
                  1 Dell Mother Board
                  15 Computer Power Supply
                  1 HP Printer Supply & Control Board * lighting finished it *


                  These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                  1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                  2 Hem Saw Computer Stack Board

                  All of these had CAPs POOF
                  All of the mosfet that are taken out by bad caps

                  Comment


                    #49
                    Re: Here is a good used source for 18650 batteries

                    Well if the tool requires all connections of the battery connected to the tool for it to work (i.e. all interstitial connections), then likely it does do protection.

                    I really need to get something to accurately measure ampere hours.

                    So many projects, motivation just not there...

                    Comment


                      #50
                      Re: Here is a good used source for 18650 batteries

                      Well they just come out with a hot glue gun which I going to buy to see what this tool has for battery protection the cost of the tool is $19.99 for tool only and $20.00 off if you also buy a battery and charger

                      The reviews are very good for this tool but a few reviews recommend a 3 to 5 amp hour battery not the 1.5 amp hour battery because it only lasts an hour

                      Update this item is not available at this time

                      https://batteryhookup.com/products/3...cells-with-pcb

                      Update this item is back in stock

                      https://batteryhookup.com/products/2...cents-per-cell

                      I just bought four more of them
                      Last edited by sam_sam_sam; 08-21-2021, 05:05 AM.
                      9 PC LCD Monitor
                      6 LCD Flat Screen TV
                      30 Desk Top Switching Power Supply
                      10 Battery Charger Switching Power Supply for Power Tool
                      6 18v Lithium Battery Power Boards for Tool Battery Packs
                      1 XBox 360 Switching Power Supply and M Board
                      25 Servo Drives 220/460 3 Phase
                      6 De-soldering Station Switching Power Supply 1 Power Supply
                      1 Dell Mother Board
                      15 Computer Power Supply
                      1 HP Printer Supply & Control Board * lighting finished it *


                      These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                      1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                      2 Hem Saw Computer Stack Board

                      All of these had CAPs POOF
                      All of the mosfet that are taken out by bad caps

                      Comment


                        #51
                        Re: Here is a good used source for 18650 batteries

                        if you keep buying tools, check out project farm.
                        https://www.youtube.com/channel/UC2r...Og_p0Ng/videos

                        Comment


                          #52
                          Re: Here is a good used source for 18650 batteries

                          Originally posted by eccerr0r View Post
                          Well if the tool requires all connections of the battery connected to the tool for it to work (i.e. all interstitial connections), then likely it does do protection.

                          I really need to get something to accurately measure ampere hours.

                          So many projects, motivation just not there...
                          If you have been following this post you can monitor BMS balancing protection board with the SkyRc IMAX b6 version 2 battery charger just select battery charging select how many battery cells and hit start

                          You have to download the software so you can plot the results

                          One note you do have to watch the screen when you get close 4.1 volts to really see how well the balancing board is responding to voltage between battery cells

                          But there is a battery type that charges the batteries 4.1 and there a battery type that charges to 4.2 volts

                          So what I do is use the one that charges to 4.1 do other things and when it finish charging them I switch it to changing it to setting to 4.2 battery voltage then watch it until it finishes charging

                          So I
                          9 PC LCD Monitor
                          6 LCD Flat Screen TV
                          30 Desk Top Switching Power Supply
                          10 Battery Charger Switching Power Supply for Power Tool
                          6 18v Lithium Battery Power Boards for Tool Battery Packs
                          1 XBox 360 Switching Power Supply and M Board
                          25 Servo Drives 220/460 3 Phase
                          6 De-soldering Station Switching Power Supply 1 Power Supply
                          1 Dell Mother Board
                          15 Computer Power Supply
                          1 HP Printer Supply & Control Board * lighting finished it *


                          These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                          1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                          2 Hem Saw Computer Stack Board

                          All of these had CAPs POOF
                          All of the mosfet that are taken out by bad caps

                          Comment


                            #53
                            Re: Here is a good used source for 18650 batteries

                            Originally posted by stj View Post
                            if you keep buying tools, check out project farm.
                            https://www.youtube.com/channel/UC2r...Og_p0Ng/videos
                            Thanks for website link

                            You might interested in this video

                            https://www.youtube.com/watch?v=TpnwBOefbvs

                            According to this video buying a bigger battery for a tool is not always a good idea which this was interesting results from the person doing the testing
                            9 PC LCD Monitor
                            6 LCD Flat Screen TV
                            30 Desk Top Switching Power Supply
                            10 Battery Charger Switching Power Supply for Power Tool
                            6 18v Lithium Battery Power Boards for Tool Battery Packs
                            1 XBox 360 Switching Power Supply and M Board
                            25 Servo Drives 220/460 3 Phase
                            6 De-soldering Station Switching Power Supply 1 Power Supply
                            1 Dell Mother Board
                            15 Computer Power Supply
                            1 HP Printer Supply & Control Board * lighting finished it *


                            These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                            1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                            2 Hem Saw Computer Stack Board

                            All of these had CAPs POOF
                            All of the mosfet that are taken out by bad caps

                            Comment


                              #54
                              Re: Here is a good used source for 18650 batteries

                              i watch all his video's

                              Comment


                                #55
                                Re: Here is a good used source for 18650 batteries

                                Originally posted by stj View Post
                                i watch all his video's
                                But what did you think about what he had presented on the one video that I referred to
                                9 PC LCD Monitor
                                6 LCD Flat Screen TV
                                30 Desk Top Switching Power Supply
                                10 Battery Charger Switching Power Supply for Power Tool
                                6 18v Lithium Battery Power Boards for Tool Battery Packs
                                1 XBox 360 Switching Power Supply and M Board
                                25 Servo Drives 220/460 3 Phase
                                6 De-soldering Station Switching Power Supply 1 Power Supply
                                1 Dell Mother Board
                                15 Computer Power Supply
                                1 HP Printer Supply & Control Board * lighting finished it *


                                These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                                1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                                2 Hem Saw Computer Stack Board

                                All of these had CAPs POOF
                                All of the mosfet that are taken out by bad caps

                                Comment


                                  #56
                                  Re: Here is a good used source for 18650 batteries

                                  Originally posted by sam_sam_sam View Post
                                  I guess I have to buy a tool and see if there is a protection board for the battery pack because there is none in the battery pack

                                  This might be one reason the cost ( plus the fact that they used non brand name batteries in these battery packs ) of the battery pack are less but the tools cost a little bit more money than the other brand lineup that I mentioned earlier in this post

                                  But because the BMS balancing protection board is part of the charger it going to make the modification to the battery pack that I have in mind a lot easier and the battery pack could also be used in other devices
                                  Well I have the answer to the question about a protection in the tool it sort of it monitors voltage and temperature of the battery and that it well and good for some applications that might be alright but what I want to do with it this is not going to work I have to buy one of there 3 amp battery pack at least the batteries packs are assembled in China and batteries are made in another country but not Japan unfortunately

                                  As you can see in the picture there are only four connections to the battery pack to the protection board

                                  Because of the way the battery protection board is it monitoring battery voltage not individual battery cells I not going to using there batteries packs for the air compressor that I bought for battery operation I going to modify it to run off of Ryobi 20 volt 12 amp hour battery pack that does have a battery protection board that is part of the battery pack because I have 3 of already

                                  I am going to have to take apart the compressor housing and see if has two protection boards or just one because it can take two batteries and take the battery protection board out of it
                                  Attached Files
                                  Last edited by sam_sam_sam; 08-21-2021, 03:20 PM.
                                  9 PC LCD Monitor
                                  6 LCD Flat Screen TV
                                  30 Desk Top Switching Power Supply
                                  10 Battery Charger Switching Power Supply for Power Tool
                                  6 18v Lithium Battery Power Boards for Tool Battery Packs
                                  1 XBox 360 Switching Power Supply and M Board
                                  25 Servo Drives 220/460 3 Phase
                                  6 De-soldering Station Switching Power Supply 1 Power Supply
                                  1 Dell Mother Board
                                  15 Computer Power Supply
                                  1 HP Printer Supply & Control Board * lighting finished it *


                                  These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                                  1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                                  2 Hem Saw Computer Stack Board

                                  All of these had CAPs POOF
                                  All of the mosfet that are taken out by bad caps

                                  Comment


                                    #57
                                    Re: Here is a good used source for 18650 batteries

                                    Originally posted by sam_sam_sam View Post
                                    But what did you think about what he had presented on the one video that I referred to
                                    the fact that the bigger packs had more torq is not because of the Ah but because they have parallel sets of cells giving a higher short-circuit current,
                                    also they probably have much better fets on the protection board with a lower on resistance.

                                    Comment


                                      #58
                                      Re: Here is a good used source for 18650 batteries

                                      Originally posted by sam_sam_sam View Post
                                      Well I have the answer to the question about a protection boards see below

                                      I am going to have to take apart the compressor housing and see if has two protection boards or just one because it can take two batteries and take the battery protection board out of it
                                      Well I have taken apart the air compressor and it does have two battery voltage monitor modules and a dual input module that separates the battery inputs but is not isolated from each other

                                      One module controls the motor which has three wires so I not sure what type of motor it is the other module has the battery wires going to it

                                      One thing I can tell you that when you have the air compressor running on just this one battery and hit the battery fuel gauge it starts with all three lights on and when running it drops to one light on

                                      I am going to run some testing on this battery and find what it can do I think that these batteries are shit

                                      So my plan to have two power supply battery packs is going to work all I have to do now is do testing on a bunch of batteries and get them in battery pack cases and hook them up and put the air compressor case parts back together and do some real world testing
                                      Attached Files
                                      Last edited by sam_sam_sam; 08-22-2021, 10:38 AM.
                                      9 PC LCD Monitor
                                      6 LCD Flat Screen TV
                                      30 Desk Top Switching Power Supply
                                      10 Battery Charger Switching Power Supply for Power Tool
                                      6 18v Lithium Battery Power Boards for Tool Battery Packs
                                      1 XBox 360 Switching Power Supply and M Board
                                      25 Servo Drives 220/460 3 Phase
                                      6 De-soldering Station Switching Power Supply 1 Power Supply
                                      1 Dell Mother Board
                                      15 Computer Power Supply
                                      1 HP Printer Supply & Control Board * lighting finished it *


                                      These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                                      1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                                      2 Hem Saw Computer Stack Board

                                      All of these had CAPs POOF
                                      All of the mosfet that are taken out by bad caps

                                      Comment


                                        #59
                                        Re: Here is a good used source for 18650 batteries

                                        Okay I ran the test on one of the batteries that I took a picture of and the results are

                                        Load 2 amp results = 1484 milliamperes hours @ 3 volt ( so they are close to 1500 milliamperes hours )

                                        Actually not as bad I thought it would be but these batteries are not good for this application not unless you were to use a lot of them together so that the voltage drop under a load would not look as steep

                                        I wonder what the 5 amp hour battery pack that they sell for $69.00 how the battery test would look like when testing one battery
                                        Attached Files
                                        Last edited by sam_sam_sam; 08-22-2021, 01:24 PM.
                                        9 PC LCD Monitor
                                        6 LCD Flat Screen TV
                                        30 Desk Top Switching Power Supply
                                        10 Battery Charger Switching Power Supply for Power Tool
                                        6 18v Lithium Battery Power Boards for Tool Battery Packs
                                        1 XBox 360 Switching Power Supply and M Board
                                        25 Servo Drives 220/460 3 Phase
                                        6 De-soldering Station Switching Power Supply 1 Power Supply
                                        1 Dell Mother Board
                                        15 Computer Power Supply
                                        1 HP Printer Supply & Control Board * lighting finished it *


                                        These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                                        1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                                        2 Hem Saw Computer Stack Board

                                        All of these had CAPs POOF
                                        All of the mosfet that are taken out by bad caps

                                        Comment


                                          #60
                                          Re: Here is a good used source for 18650 batteries

                                          1500mAh is more than good enough for flashlights and USB power banks, and certainly better than some of the crap China will sell you...
                                          Originally posted by PeteS in CA
                                          Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                                          A working TV? How boring!

                                          Comment

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