Solution:
Amazfit Bip can stay up to 4 Months basic use/ 45 days regular use/ 22 hours GPS + Running mode.
4 month battery life is tested with a basic use: time display, exercise monitoring and sleep monitoring.
45 days battery life is tested with the following use: a 30-minute workout each week, receive 100 notifications each day, and screen brightness level is set at 10%. Actual battery life may vary owing to differences in individual usage.
If your watch battery is draining fast, please make the following test：
Fully charge the Amazfit Bip to 100%, remove it from charger, turn off Bluetooth on your phone and make it untouched for 24 hours. If power consumption is equal or less than 3% in 24 hours, it means battery is working normally. If it is greater than 3%, it means battery is draining very fast.
Does it help?