Liftmaster 475LM battery backup
- Liftmaster EverCharge Garage Door Opener Battery Backup System
- For use exclusively with the LiftMaster 3500 and 3800 Estate Series Models
- Always charged and ready, the EverCharge powers the ESTATE SERIES 3500 ans 3800 models, to open and close the garage door up to 20 full cycles when the power goes out.
- Simple to install, it sits on top and plugs right into the back of the Model. For low headroom installations, the EverCharge? can also be mounted to a joist/rafter on the ceiling
- 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 is operable, when it is in use, or when the batteries need to be replaced.
- Every month, 100,000 homes in the U.S. lose power.
- Most families rely on the garage door as the main entrance to their home.
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