Unfortunately, I think it had one too many nights on it's wireless charging pads. I discovered it with it's back distended. I let it sit for a few days turned off and then carefully pried off the back. The battery looks like a water bed. I tried to gingerly to remove the plate necessary to free the battery, but one of the screws right next to the battery won't budge and and I decided maybe I don't want to work it any harder. Sad to see her go. It was a great back-up phone. This is another reason we need removable batteries that are easy to check and monitor (I'm looking at you, Google ). Will take it to Best Buy tomorrow and see if they will safely dispose of it safely for me. I love my Nexus 6p, but the Nexus 5 was a sentimental favorite, kind of like my TX.