# Chamberlain code 3-3: the battery light keeps flashing green

Source page: https://garagedoorscience.com/code/chamberlain-error-codes/3-3

## The battery light keeps flashing green

The circuit that charges the backup battery has a fault. It sits on the logic board.

**Call a pro.** The logic board needs replacing. Call a pro.

From the maker’s manual:
- Chamberlain manual for model B980, PDF page 40: https://cgi.widen.net/content/vlzppckqt9/original/114a5126.pdf
- Chamberlain manual for models B4603T, B4643T, B4613T, B6713T, B6753T, PDF page 43: https://cgi.widen.net/content/zwq7paf7l4/original/114-5739-000.pdf

Garage Door Science isn’t affiliated with the opener makers LiftMaster, Chamberlain or Genie. Each meaning is our summary of the maker’s own manual, which we link.