LiftMaster Garage Door Openers 41A6357-1 485LM Battery Backup Always charged and ready, the EverCharge powers the garage door up to 20 full cycles when the power goes out. Audible signal sounds when door is moving under battery power. All safety and security features still operate. Bright LED lights let you know that the EverCharge battery is operable, when it is in use, or when the batteries need to be replaced. Same as part number 41A6357-1, 485LM and 4228