I have the battery draining problem. However, at least in my case, it is NOT “normal degradation with age”, as was suggested above. My phone normally uses 0.5-0.9%/hr idling on WiFi only, and ca. 1.5% idling with cellular on (measured with the AccuBattery app).
Occasionally, there is a sharp dropoff from a slowly downsloping line (representing the normal low hourly consumption) to a steep line on the graph in Settings -> Battery, seemingly out of nowhere, starting when the phone is totally idle, screen off, at home, until the battery is empty fast. When it happens at night, the phone will unexpectedly have drained and turned off in the morning, which is a pain as the alarm clock will not work.
It happened right now. The percentage usage shows:
Android OS 25%
Republic Wireless 17%
Cell standby 13%
The percentages are “since last full charge”, not just during the episode of fast draining, i.e. the AndroidOS + Republic usage during the episode itself is probably much higher.
… which is not very helpful, but to me the evidence suggests that Republic triggers some CPU intensive process at either scheduled or arbitrary times, which in turn probably uses Android OS services, together resulting in the fast battery drain and dead phone (unless noticed by me before the phone is dead).
The deep sleep percentage, usually 90%, is also much lower whenever this happens.
Definitely, this is NOT normal battery age related. My battery normally lasts 2-4 days, but only a few hours when this sharp, sudden dropoff in the consumption graph occurs. After brief charging, the fast energy loss is gone and the consumption is back to normal.
This whole episode seems to happen about once a week or so, but it’s a pain as the phone is sometimes unexpectedly dead when I need it the most.
Cell phone is Moto E 2nd gen. with the Republic pre-installed system. The system and all apps are up to date, and I have only a few select apps and no major apps with high battery usage installed, nor do any apps show major usage in the histogram.