I get around 2 hours of screen on time. Some days I get that in 8 hours, some in 15. Screen on is the limiting factor. As long as your Android OS usage is 5% or below, then you are getting about as good battery life as you're going to get on these phones. The other major factor would be cellular signal quality. If you can stay in a good service area or on Wifi, then that will be a low power draw.
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