This device has a 3220 mAh Li-Ion removable battery with Adaptive Fast Charging Support (50% 30 min, 100% 100 min).
For fastest charging times, use the Adaptive Fast Charging charger that came with the device.
To turn on Fast charging, navigate: Apps > Settings > Battery then tap (check) Fast charging.
Ensure the cable is inserted correctly into the charging base for optimal performance.
Don't use a battery or charging accessories that haven't been approved by the manufacturer as this may damage the phone and/or battery.
Battery life depends on the network, signal strength, temperature, features and accessories used.
It's common for batteries to be warm from use or charging.