So I have a Moto X2 which I bought new and put into service January 2016. It does not feature a removable battery. I believe there are some DIY guides on how to replace the battery but it involves disassembly and possibly fine soldering equipment, and I would imagine a fine solder vacuum too.
So I am beginning to have battery glitches and issues and figure that the phone's days are numbered. It will be showing, say, 49% charge but power itself off and upon powering it back up it will show 20% or less charge and refuse to boot until connected to charging cord. The other evening it charged to only 49% overnight. I did a procedure that resets the battery "meter" or whatever on the Moto X phones, which is with it plugged into charging cord you hold power button for at least 7 seconds and it reboots, and a status led at top above the ear speaker flashes green momentarily before boot-up screens are displayed. Supposedly that signals that battery calibration mode has been triggered and you then leave it on charger until 100% charge is achieved. It worked and so far the phone is behaving again. But clearly the battery is beginning to exhibit some aging issues.
I am on Republic Wireless's legacy refund plan and typical monthly bill is $14 - 20 never higher, that's with 1 gig LTE cellular data which I rarely exhaust since most data use on the phone happens when connected to WiFi, which is just how I roll.
I can bring any unlocked android phone to Republic and use it but I'd lose the legacy refund plan and have to transition to their current plan which would raise monthly to around $25 - 30 for the same 1 gig LTE data limit. You can buy much more LTE data as needed. Republic utilizes Sprint/T-Mobile and the coverage is fine for my usage.
So is 3 and a half to 4 years about the limit for lithium cell phone batteries?