Lion Energy UT1300 Battery Heater Kit

Lithium battery heating system allows you to use your lithium batteries on those cold weather campouts. Uses only 1/2 amp draw! ALL types of batteries need to be above freezing in order to charge them. The thermostat turns on at 42 F with a +/- of 5 degrees.   It turns off at 68 F with a +/- of 5 degrees.