warm lipo hard case

[ducatikid]

Hi i'm currently running my TLR 22 with a Mamba Max 7700kV set up. I've just been out for around 10-15 minutes running the car on tarmac and grass in my cul-de-sac. I have the ESC to cut off the Lipo at 6V and it ran fine, but noticed the cells were very warm and have ever so slightly swollen. They are Intellect saddles 35c 5000mah. Should i bin them and buy some more? I realise there isn't much cooling in the 22 and i have cut the screen out by about an inch up and across.
Just checked the Voltage, one cell is 3.49V, the other is 3.57V. They are always balance charged using an Etronix power pal.

Cheers

Lee