the nicads that i have currently have are the Sanyo RC 2400 12v Sub C NiCads sold on overlander. Not too surprising that they are having a hard time off a 3hp mag. I am looking at running the mag off the nicads and get around 6 spin ups and the drive off some nimh i have lying around.

I wish I had the cash to invest in lithium batteries but sadly its not available at the mo. I will just have to win a few events through the summer