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Old 02-01-2022, 04:10 PM   #2
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Default Re: Dell LA-C571P - Won't Charge - Battery 255%

if there is a charge on it. It also will not charge the battery and reports the percentage at 255%.
Perhaps a new Energizer battery ??

See attached. Meter in DC 20V scale (or similar).

Attach the battery and power adapter.

Measure and post the voltage on the battery SMB lines. There is the SCL (Clock) & SDA (Data) lines used by the SMB Host (Master) to ping the battery (SLAVE) to determine its stats.

255 decimal = FFh (hex). Guessing that the bus is reading back 255 as a value from the battery.
Attached Images
File Type: jpg smb_battery.jpg (102.0 KB, 14 views)

Last edited by mon2; 02-01-2022 at 04:31 PM..
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