AMX AXB-TCR - Manual (Page 17)

Installation and Wiring
13 AXB-TC and AXB-TCR Television Controllers (& Receivers)
There is a danger of explosion if you replace the battery incorrectly. Replace the
battery with the same or equivalent type, recommended by the manufacturer.
Dispose of the used battery according to the manufacturer's instructions. Never
recharge, disassemble, or heat the battery above 212 °F (100 °C). Never solder
directly to the battery or expose the contents of the battery to water.