For my po1x I got this 2250mah twix deal
https://aliexpress.ru/item/1005005043077240.html?sku_id=12000031429438778
short circuited it a few too many times while removing and attaching the boards, and at least once to the phone housing cause I forgot the isolation, but somehow it survived and seems to be working fine. I'm going to torture it with fast charging see how long it lasts for me.
Sidenotes:
- Bunch of ribbon cables under the battery, I almost destroyed one while prying it off, some real tough glue there.
- My bottom speaker always worked intermittently, and especially at