Xantrex Temperature Sensor BTS f/Freedom 458 Series Battery. Xantrex designed these Battery & Cell Phone Chargers with a 15ft cable that you can mount on the terminal post of a battery in a bank or on the side of a battery. Depending on the ambient temperature of your environment your Freedom 458 Inverter Charger may increase or decrease the output of your batteries to ensure you get the maximum charge out of them. Use this Xantrex Battery Sensing BTS for Freedom 458 Inverter Chargers to ensure your batteries get the proper charging they deserve. Specifications for Xantrex Battery Temperature Sensor BTS f/Freedom 458 Series: Manufacturer: Xantrex Color: Black Features of Xantrex Battery Temperature Sensor BTS f/Freedom 458 Series Gives charger proper temperature compensated charging 15 ft (4.6 m) communications cable Compatible Devices: Freedom 458 Series Package Contents: Xantrex Battery Temperature Sensor BTS f/Freedom 458 Series Xantrex 76-0022-00: Temperature Sensor BTS f/Freedom 458 Series Battery