The Chamberlain Replacement Garage Door Opener Battery recharges for up to 20 cycles without grid power and will allow you to get in when the power goes out. It is compatible with Chamberlain battery-backup garage door openers.
| | Chamberlain Replacement Garage Door Opener Battery 4228 |  | 26.95 |  |
 | Chamberlain Replacement Garage Door Opener Battery G4228 |  | 20.48 | |