Your watch is fully optimized to get enhanced battery life. Under the Normal usage scenario, it will give a battery life of 9 – 10 Days and for Heavy usage scenario, 5 – 6 days of battery life. Normal Usage Scenario -Default dial, Manual heart rate, 4-5 app alerts, 75% brightness, Sleep monitoring enabled, Lift the wrist 100 times a day. Heavy Usage Scenario: Customized dial, Automatic heart rate on, 7-8 app alerts, 80%-90% brightness, Sleep monitoring enabled, Lift the wrist 100 times a day. X2 comes with a standby time of 30 days. Standby time denotes when your watch is used as a regular watch with Bluetooth off.