SKYRC SK-600040-01 Temperature Sensor for Helicopter This temperature sensor plugs into the side of most of today's high-end lipo, nimh, nicd chargers. Generally, the charger will display the batteries temperature while charging. Most chargers also have the capability to stop the charging process if the battery reaches too high of a temperature reading. So this little accessory can greatly improve the safety of your charging process! Plug the battery to be charged into the charger. Select the correct battery chemistry type. Plug the temperature sensor into the port of charger. Secure the sensor to the battery pack using the supplied hook-and-loop velcro strap. Ensure the area beneath the sensor is free of dirt and debris. If possible, avoid placing the sensor over a decal. Temperature range: 32f-176f (0c-80c). Wire length: 45cm. Velcro length: 22cm.