You must connect charger to AC power before connecting to the battery pack. Otherwise, the charger will NOT charge the pack and you will not get a RED LED indicating charging.
Connecting the battery to the wrong polarity will damage the charger. We are not responsible for the damage or losses caused by misusing!
Charging terminal: Standard Female Tamiya Connector.
Included one pc connector adapter - convert from Standard Male Tamiya plug to alligator clip.
Waterproof ultrasonic distance sensor. This sensor can be used for collision detection in your project.