following on from the 'Tiger Power' thread, Just had a very interesting conversation with a guy in a model shop - he said he'd replaced the 7.2v battery in his Heng long with a 6v rechargeable lead battery, which had reduced the speed, increased the torque, and massively increased the battery life.

I questioned whether it would affect the circuit boards, but he reckons he's had no probs.

any thoughts on this? sounds reallly interesting...