Remember that iPhone update that cut down on the phone battery life? Well it looks like Android is doing the same thing. Probably restricting the crazy fast charging and enforcing max and min battery levels to extend battery life and prevent battery "mishaps".
The difference is Google learned from Apple's fumble and is offering free battery replacements, $50, or a $100 credit against a new phone.
Well, if you have a Pixel. No idea what other phones get.