MaximalPower 5-in-1 Cell Meter Pocket Battery Capacity Checker MaximalPower 5-in-1 Cell Meter can display the estimated capacity and voltage for LiPo / LiFePO4 / Li-ion / NiCd / NiMH battery packs. Use this function to quickly check if your battery requires charging before use. For LiPo/LiFePO4/Li-ion packs, it can also display the voltage of each cell, so you know when they need to be balanced. Battery Balancer: Optimize your battery’s performance, and extend the overall lifespan, by ensuring the individual cells are balanced. Battery Discharger: Discharging your battery prior to changing can improve the runtime of your battery. MaximalPower 5-in-1 Cell Meter can discharge lithium-based battery packs to an adjustable threshold, at the discharge rate of 180mA. Battery Internal Resistance Tester: For lithium-based battery packs, this cell meter can display the internal resistance of each individual cell, so you can evaluate the health of your battery pack and decide when to discard or replace it. ESC/SERVO PPM Tester: Supply a reliable PPM signal to test and adjust your servo motors. *Note: A Y-harness and 4.8V-6V NiMH battery (not included) is needed to support ESC/Servo function. Package includes 1 x 01444 MaximalPower 5-in-1 Cell Meter for LiPo / LiFePO4 / Li-ion / NiCd / NiMH Battery Packs 1 x User manual WARNING - To avoid overheating, the discharge function can only be used for less than 6 minutes each time. After that, let the unit cool down to room temperature before discharging again. - DO NOT leave your battery discharging with this device unattended.CABLE NOT INCLUDED!