See: AVID RC

AVID have introduced a new voltage checker and added a white 2S charge lead to their range of colored charge lead cables. First up is the voltage checker, allowing to check the voltage of 1S to 6S LiPo batteries features an easy-to-read LCD display. The device is also reverse connection protected and comes pre-soldered with 4mm and 5mm bullet connectors. Next up is the white 2S charge lead cable. Designed to charge 2S batteries, it is 63.5mm longer than the charge leads so they can easily be plugged into any charger design. The white 2S charge lead cable comes pre-soldered with gold-plated 4mm to 5mm bullet connectors and with XH 3pin balance plug.