myQ App Shows Low Battery. The Chamberlain Replacement Garage Door Opener Battery recharges for up to 20 cycles without grid power. 4.2 out of 5 stars 15,565. 4.5 out of 5 … Beiter DC Power. It is compatible with Chamberlain battery-backup garage door openers. 40 $49.99 $49.99 This message is an indication that the battery in the door sensor is low and the battery needs to be replaced. Chamberlain Group myQ Smart Garage Door Opener Chamberlain MYQ-G0301 - Wireless and Wi-Fi enabled Garage Hub with Smartphone Control. 40 $49.99 $49.99 Chamberlain / LiftMaster / Craftsman 4228 Replacement Battery for Battery Backup Equipped Garage Door Openers ( Packaging May Vary ) 4.6 out of 5 stars 2,116 $30.40 $ 30 . Chamberlain / LiftMaster / Craftsman 4228 Replacement Battery for Battery Backup Equipped Garage Door Openers ( Packaging May Vary ) 4.6 out of 5 stars 2,209 $30.40 $ 30 . Replacement Battery 132B2511, DJW12-4.5 Lasts Longer Than Original! Replace the battery in your door sensor and then it can take up to 6 cycles of activating the garage door opener to clear the low battery message from the app. Allow you to get in when the power goes out.