Thunder Power 3c losing charge quickly?

[Praztek]

I have the following two batteries and after letting them fully charge " 4.2 v " per cell, I only get approx 1 min flying time and already hear the motor winding down? I put them on the DN power charger/balancer and it reports each cell being at 3.8-3.9 v.

Thunder Power 3c , 2070 mah, 11.1v
Thunder Power extreme v2 3c, 2200 mah, 11.1v

Any advice would be greatly appreciated.


Thanks

[teamcompton]

3C??

[Praztek]

3 Cell


Thanks

[kianhon]

It happens when you fly your heli fresh or you already down few packs? If you already down few packs then it will be your motor over heating that caused this. If not then I suggest you put in new motors, might be the 4-1 controller but If I were you I'llstart with the motor 1st, is only $8 each. 4-1 controller either work or they don't, so motor is wat I would go for.

This happen to both of your Lipo too? If no then probably one lipo is dead.

[Praztek]

It happens when flying fresh, I charged them up the other day at .04 amps and they seem to be working more smoothly.

Thanks