LinkPRO Temperature Sensor Kit:

With the Link Pro temperature sensor kit, precise battery monitoring can be accomplished by tracking the exact temperature of your battery. The temperature sensor kit contains a temperature sensor with M8 ring terminal for the battery side mounting, a 10 meter cable and a RJ12 connector.

WARNING: This product can expose you to chemicals including Diisononyl Phthalate (DINP) which is known to the State of California to cause cancer, and Di-isodecyl Phthalate (DIDP) which is known to the State of California to cause reproductive harm. For more information go to P65Warnings.ca.gov.

Quick Guide (pdf)