Just had the same thing happen to ours. Ordered a new 5X for my wife and the cheap amazon battery to see if the n5 can be salvaged (even if just for backup use). Took 10 min to replace and has been like a new phone (granted just a few days so far, but still). This is the one I ordered. Clearly not OEM but they also don't cover that fact up which I liked. http://www.amazon.com/BinTEK-Battery-2100mAh-Premium-Compatible/dp/B00RKGSA5Y