TST 507 Monitor battery replace?

It is easy to damage those tiny screws in a 507 if you use the wrong screwdriver. You need a size 000 Phillips. I found one at Sears, and they can be found online.

When my monitor's battery died, I contacted TST to ask if I could buy a new battery. Even though the unit was out of warranty, they shipped me a brand new monitor free of charge. They even apologized because I was going to have to reprogram the sensors into the new monitor.

Here is the thread where it all happened. https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/28550166.cfm

Call TST for the correct answer. They have outstanding customer service.