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LiftMaster Dual Battery Backup Unit for Door Opener Systems - 041-0406-000

The LiftMaster Dual Battery Backup Unit supplies continuous Door or door movement when main power is unavailable. Each unit holds two batteries wired for high-capacity standby support, maintaining full operational control through long outages. Designed for LiftMaster Openers with integrated backup circuits, it connects directly to the system harness and restores full runtime after recharging.