Recently I purchased a replacement battery for my nexus 7 after I could not get my old battery to accept a charge. I ordered a C11-ME370T from eBay. It appeared to charge fine but it would not display percent remaining, only an exclamation point.
The replacement battery came from a US eBay seller "Mallforpower". The battery skin actually had an ASUS logo on it, but it had been sharpied over. So clearly this was meant to be a counterfeit battery but the US seller apparently wasn't cool with it. So I paid for a generic battery and received .. a generic battery.
I tore both old and new batteries down to compare. The difference was readily apparent. My original Nexus 7 battery had a good charging board with a bunch of chips on it. The replacement battery had a dirty soldering job and completely different layout. The battery communication circuitry wasn't present or working, hence the exclamation point.
The solution I tried was simple but appears to have worked. I soldered the new lithium cell to the old battery controller and so far so good. The tablet shows a percent remaining, although I suspect it may need to be recalibrated, but we'll see. Thought it was worth mentioning in case anyone else comes across this problem after replacing their battery.
The replacement battery came from a US eBay seller "Mallforpower". The battery skin actually had an ASUS logo on it, but it had been sharpied over. So clearly this was meant to be a counterfeit battery but the US seller apparently wasn't cool with it. So I paid for a generic battery and received .. a generic battery.
I tore both old and new batteries down to compare. The difference was readily apparent. My original Nexus 7 battery had a good charging board with a bunch of chips on it. The replacement battery had a dirty soldering job and completely different layout. The battery communication circuitry wasn't present or working, hence the exclamation point.
The solution I tried was simple but appears to have worked. I soldered the new lithium cell to the old battery controller and so far so good. The tablet shows a percent remaining, although I suspect it may need to be recalibrated, but we'll see. Thought it was worth mentioning in case anyone else comes across this problem after replacing their battery.
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