Author Topic: Repairing Battery Pack  (Read 1499 times)

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Offline baget

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Repairing Battery Pack
« on: September 01, 2014, 07:36:11 pm »
Hello
I have a cheap battery pack that does not seem to work.
the PCB has USB connector for power output and microUSB connector to power input

when I connect a microUSB I always see a green light indicating that the battery is full...
when I measure the volt on the battery I get ~0.850v when I unplug the microUSB power I see the battery volt is downing down very fast...

the ICs on the PCB that I could see are:
DW01 and 8025A

I think the problem is with the battery, what is the best way to confirm that expect from replacing the battery?
 

Offline amyk

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Re: Repairing Battery Pack
« Reply #1 on: September 02, 2014, 04:52:33 am »
Quote
DW01 and 8025A
That's a pretty standard lipo protection combination. If you measure 0.85V on the cell itself then it's certainly dead, if it's after the protection then check the voltage at the cell terminals to be sure (be careful of shorts!)
 

Offline baget

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Re: Repairing Battery Pack
« Reply #2 on: September 02, 2014, 09:16:13 pm »
Quote
DW01 and 8025A
That's a pretty standard lipo protection combination. If you measure 0.85V on the cell itself then it's certainly dead, if it's after the protection then check the voltage at the cell terminals to be sure (be careful of shorts!)

0.85v is on the battery terminals
 

Offline amyk

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Re: Repairing Battery Pack
« Reply #3 on: September 04, 2014, 01:10:38 pm »
Dead cell.
 


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