With lipos you can basicly have one battery and run all day with it. You can put it on charge as soon as you've finished racing and then put it back in your car for the next round!.
Normal batterys after being run need to be discharged and re-charged from flat. If you don't do this you won't get the best out of the cells.
Also with normal cells they will get warm after a run and you have to give them time to cool down before re-charging them.
Usualy people who run nimh batterys will have 4 or 5 sets.
As I said above,if you really wanted too you could just buy one lipo pack and run all day with that!.
Go lipo, it's the future!!!!!!.
