5c lipo battery help

[Patrick]

How old is your 3s 4000mah pack and how much use has it had?
You can use a 3s pack with a 2s pack of the same mah and type wired in series (that's what I have in my truggy), but it's best not to use old cells with new cells. Otherwise the same thing that sikeston34m was talking about in the first half of his post could end up happening.

[hobbimaster]

The pack itself is a Maxamps maybe 4-6 months old, But I only used it maybe 6 times since the 1/10 buggy I put it in was basically uncontrollable.

[hobbimaster]

BTW, will a motor run cooler as voltage is increased? I want to use a neu 1512 2.5 and have read the motor gets hot as compaired to a 1515 1y.