How do I charge the battery for the TC800? BB - CS December 15, 2017 16:52 Follow Place rechargeable battery in the charging unit. Plug into wall. Related articles Call Us How do I charge the battery for the TC1200? How long will the light last on a full charge with the Lithium battery? How long does it take to fully charge a depleted battery? I don't understand the amount I was charged for my Flashlights. Comments 0 comments Article is closed for comments.