The iKALL W4 comes with a strong 500 mAh battery that works for 4–7 days on standby. Even with heavy use, it runs for 2–3 days without worry. The wireless charging option makes charging simple and fast. You can use voice calls, Bluetooth music, and all notifications right on your wrist. This smartwatch is made for people who want comfort, long battery life, and useful daily features https://www.ikall.in/product-page/i-kall-w4