Recent content by 123xyz

The LM475 is a separate unit that suits out side of an opener that was not sold with an internal battery, but was equipped to connect to an external backup power supply (the LM475). You can still buy replacements for the lead/acidvbatteries that go into an LM475 or the circuit board that runs...

Can anyone identify this connector so I can find its mate? I have a Liftmaster 8500 garage door opener that was sold without a battery backup. They used to sell a backup battery for it (the LM475), but that's been discontinued. So, I'm making my own backup battery. My opener has a plug on the...