The EverCharge Battery backup system, offered by Door Doctor, allows the opening and closing of your garage door in case of a power failure. The system will operate the garage door for a total of 20 cycles in a 24 hour period and will automatically recharge when the power returns. LiftMaster devices provide outstanding reliability and efficiency and allow you to remain confident in the most problematic situations. The EverCharge power system ensures a silent operation and tells you when the backup system is on. UL approved. Opt for Door Doctor garage door accessories to facilitate your operations. The LiftMaster devices are compatible with the Door Doctor garage door operators and are equipped of a safety system which provides you the peace of mind you deserve.