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Easy DIY- Battery Replacement Instructions 1. Disconnect power to opener. 2. Using a Phillips head screwdriver remove the battery cover on the motor unit. 3. Remove old battery and discard. 4. Partially insert new battery into motor unit with terminals facing out. 5. Connect red + and black – wires from motor unit to corresponding terminals on battery. 6. Replace battery cover. 7. Reconnect power.****THIS IS A LIFTMASTER BATTERY NOT A.
GENERIC REPLACEMENT.
MODEL 485LM EverCharge Integrated Standby Power System For use exclusively with the LiftMaster garage.
door operators 3850/8550.
Operates the garage door opener as if the power was still on all safety and security features still operate.
Standby Power System and opener are one logic board resulting in better performance in Standby Power.
Improved Battery Recovery System.