... 11. Send a low battery alert to the user if the battery is low.//Gps tracker, ... Gps vehicle tracker, Gps car tracker, cargo tracker, mini tracker, kid tracker, pet tracker, watch ... , mini tracker, kid tracker, pet tracker, watch tracker.SpecificationContent Specs. Dimension 45(L)x38(W ... 24V input, 5V ouput Battery Power 3.7V Li-Ion Battery,450mA Battery Life About 50 hours ...