Expeertise in lipo'ness needed

[Mansfieldrcsecretary]

Hi there hoping for some opinions on this.
My problem is;
I have a losi scte 3kg short course truck and it is killing batteries. The lipos (5900 lrp, 5000 core rc and 5600 orion) are coming out after a run at 60*c +, swelling and it would appear in danger of death.

I bought a whole new motor and speedo set up, same thing hgappens. The speedo and motor are never above 50*c.
I'm assuming its because of the power draw.
Any ideas or recommendations on cells or mods to improve this.
Cheers