Under typical use, the Moto360 (Gen. 3) 355 mAh battery lasts a full day (24hours) after a full charge. On Time Only Mode, you can expect it to last for 3 days.
*Typical Use refers to a situation where you freely use the several functionalities and applications on the wristwatch.
*Time Only Mode, on the other hand, is limited use of the watch for time and date checking only.