With typical usage, a Ring doorbell’s internal battery can hold its charge for up to 12 months. However, with heavy use, the battery could run low in less than six months. You’ll receive an email alert telling you that the battery is running low. The Ring app also shows a low-battery alert, along with a battery-level indicator, so you’re never caught unaware. Depending on the type of charger you use, the battery takes about four to ten hours to recharge.