Phone lithium battery life can be doubled or more dependent on how you recharge them.
Fully charging to 100% then letting them sit too long is bad for these batteries.
Also letting them discharge to 0% all the time before recharge is bad.
If you keep your battery charge between 20% to 80% you can double the battery life, before it needs replacement.
This also applies to lithium batteries on EVs. However it gets even better for EVs.
Keep your battery charge between 40% to 60% that lithium battery will last 20 years before needing replacement!
The EV battery will actually last longer than the EV itself!
Learned this at
Battery Universe