The Chamberlain Replacement Garage Door Opener Battery recharges for up to 20 cycles without grid power. Allow you to get in when the power goes out. It is compatible with Chamberlain battery-backup garage door openers.

• For replacement in Chamberlain battery-backup garage door openers
• Helps prevent lock-outs
• Recharges automatically
• Keeps the garage door working for up to 20 cycles when the power goes out