I recently encountered trouble with my cell phone battery after roughly 2 years of usage and figured anyone thinking of integrating LiPo batteries into a project might benefit from the data I’ve gathered (or anyone just curious).
After 345 wear cycles the battery capacity is around 62% and it has trouble supplying enough power to keep the phone stable when it gets below 20%. The functionality of the battery seemed to drop off pretty quickly after a certain point. I looked up data on the life expectancy of LiPo batteries and found 300 to 500 wear cycles is typical. Based on this data I would say 500 wear cycles is very optimistic but 300 is definitely obtainable. If you’re interested in gathering this kind of data on your phone, I used AccuBattery to do it. If you root your phone first then you can later directly scrape the SQLite database used by the application. I didn’t do that (this time…) so I’m working with whatever the application wants to show me.