All types of batteries need to be above freezing in order to charge them. This lithium battery heating system allows you to use your lithium batteries on those cold weather campouts. The thermostat turns on at 42 F with a +/- of 5 degrees. It turns off at 68 F with a +/- of 5 degrees. And it only takes .57A when warming the battery and 10.13mA when on standby.
- Dimensions: 13 x 3 x .2 in.
- Eyelet inner diameter: 6 mm.