BatteryMINDer ABS-248 12/24 Volt Battery Charger Temperature Sensor BatteryMINDer ABS-248 12/24 Volt battery temperature sensor can double the life of any type of 12V or 24V battery when used properly 2' Ring Mounted Temperature Sensor and 6' Extension Cable Prevents over/under charging batteries Senses battery temperature and allows charger to automatically adjust output to ensure correct rate Works from 0130F