5Pcs BS301CV 4 in 1 2.1A 4.2V Charge Discharger DC-DC Boost Converter Power Supply Module Board Mhz Stator Diamter:8mm

Stator Diamter:8mm

Comes with  Free Gift: 1 transmitter strap+ 1 throttle modify set+ 1 update cable

(as picture 3)

Back (large current wire):

Model: 860008

5Pcs BS301CV 4 in 1 2.1A 4.2V Charge Discharger DC-DC Boost Converter Power Supply Module Board Mhz Stator Diamter:8mmFeature: 1. BS301CV is a multifunctional 3. 7V 4. 2V Mobile Power Diy module,3 in 1 Function: charge,discharge and battery protection. 2. It is very suitable for DIY mobile power. 3. Comes with battery protection, do not need battery protection board (if your battery comes with a protective board, it does not matter) 4. Overcurrent protection(OCP) 5. Overvoltage protection(OVP) 6. Short circuit protection(SCP) 7. Over temperature protection(OTP)