How do I charge the battery for the TC800? BB - CS December 15, 2017 16:52 Place rechargeable battery in the charging unit. Plug into wall. Related articles How do I charge the battery for the TC1200? How long does it take to fully charge a depleted battery? My TC800 Flashlight does not work / does not turn on Contact Us How long will the light last on a full charge with the Lithium battery? Comments 0 comments Article is closed for comments.