I also have a Quantya and made a new battery out off Gens ace lipo 6 s.
These lipo have a high C and I made them out off 6s 16.000 mah. Had to make them as a 14S3p so came at 46 Amp.
If you want a new one with the Kokam cells you have to pay a lot more. I use the Original charger and works fine for me.
Was also thinking off using Hybride car cells but have problems with the dimensions.
