The decoder has an internal lead acid battery of 15Ah capacity which will last about 6-8 hours with the passive antenna or 24 hours with the active loop.

It can be charged while running, so it is recommended to connect the decoder to external power during the race when available.

Charging an empty battery takes approx. 4 hours when the decoder is turned off, and 8 hours when running. The LED Battery Charged on the keypad indicates the battery has been charged by at least 75%.

The battery fulfills IATA Special Provisions A48 and A67. The system can hence be handled as common cargo for both air shipment and boat shipment.