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Old 02-01-2022, 04:37 PM   #3
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Default Re: Dell LA-C571P - Won't Charge - Battery 255%

Originally Posted by mon2 View Post
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.
3.3V on both of those.
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