tk70 question

[Shooter21]

when i run my tk70 in the highest mode the tenergy centura batteries make a whining noise does anyone else have this happen? thanks in advance

 

[kromc5]

Hello,

I have tried tenergy and maha powerex and have not noticed any noises from the batteries.

 

[2100]

Charge them up to the max. They only make a whining zzeezezeee.... noise when the driver is boosting quite a bit (cells low voltage)