Please find here our new little helper you should always have.
The V-Checker & Balancer checked after plugging a LiPo pack up to max. 6S each cell shows the respective voltage of the cell and balanced even if the cells may be non-uniform in the voltage level. This is also displayed by LEDs. So you can check the battery within seconds. A start with an empty or possibly a defective battery, a thing of the past. – Direct connection for 2-6S batteries with "Thunder Power" Balancersystem (Top Fuel 30 + 40S series)
– For TopFuel ECO-X batteries XH connector system adapter cables are required