This is the optional Thunder Power/Flight Power Balance Board|
for LiPo Batteries.
Optional lithium balancing board for use with the Hitec 4x
Compatible with LiPo Batteries ranging from 2S to 6S (7.4V - 22.2V)
having the Flight Power/Thunder Power type balancing plug
Balance Board and Wire Adapter for Flight Power/Thunder Power type
Connecting between battery and charger