What is the average batter life of the device with normal use? Does the operating system support a battery saving mode where the user can quickly change several different power consuming attributes at once?
You should be able to get through a day with average usage on the device. There is a battery saving mode that turns on at 15% with additional options to change it to 5% or immediately. The G Flex 2 also comes with the Fast Charge capabilities as long as you are using the charger that comes with the phone. This can charge your phone up to 50% in 40 minutes.