It is most likely the PCB in the battery. It might work but you won't know when it will die. I have seen the same thing before. This seller has good ones and this listing is for 4325mAh version which is 55mAh more capacity than the 4270mAh battery but most important is it fits better which means it won't be able to come loose as easily. http://www.ebay.com/itm/Google-ASUS-Nexus-7-OEM-3-7V-4325mAh-16Wh-Li-Polymer-C11-ME370T-Battery-OEM-/400617717795?ssPageName=STRK:MESE:IT