We use high quality Batteries from
4 Amp Hour 12 Volt7 Amp Hour 12 Volt
We replace most monitored residential control panel batteries Free while doing a service call
Key Fob Battery Ask for "CR2032" at Radio Shack or Walgreens
CR2032
The "CR123A" is used in most device transmitters
CR123A
These could be used in some transmitters and are available at most stores
AA Battery9 Volt BatteryAAA Battery