Losing power to engines quickly.

[ulsa]

I got a problem with my Redcat RS10.

After about 10 minutes of driving I lose power as if the battery is getting weak. I have tried 3 batteries (2 new) all fully charged with the same result. The batteries are not empty and when charging them I get about 800 mAh in them (have tried two 3800 mAh & a 1800 mAh). Batteries are NiMh.

I'm running stock except for the servos "MG995 Metal Digital Servo HS 645 MG 15KG"

When I installed the servos I also installed a BEC and during installation the battery ends where crosswired for a few seconds when the BEC was connected. The BEC did not work after that so it was removed. As I remember I ran the crawler a few times with new servos and without the BEC without any problems but I'm not sure…

Could it be that the new servos require high voltage and as soon as the voltage in the battery decreases the power to the engines drop?

I know that the easy answer is to reinstall the old servos and check what happens but if I don't have to…

Any help would be appreciated. I am kind of new at this...

[Charlie-III]

Does your ESC have a LVC? If so what is it set for?

[ulsa]

There is no built-in LVC in the ESC.

[Charlie-III]

Are the motors or ESC getting hot?

[ulsa]

The motors are not cold but not even close to burning hot.
The ESC is well cooled.

I have tried to run the car after a few hours with the same battery which I know have about 3000 mAh left in it and then I immediately get the problem so overheating should not be the issue here.