How long should I charge the battery? October 08, 2024 23:37 We recommend charging the battery for 4 to 6 hours to obtain a full charge. Related articles How long will the rechargeable battery last with a full charge? The USB port is not charging my device. iCVBT7 I am trying to charge the mirror but the Battery Level Indicator is not turning on? My mirror is "locked up" and does not respond as expected.