I just bought a Slash Model 5803. I bought it for me to have fun with my grandson who is only 6 years old. I'm looking to tune the car to get the longest run time at a relatively slow speed. I haven't even run the first battery yet but I'm pretty sure the battery supplied will have a pretty short run time. If there is a way to slow the car down and extend the run time, that would be fine for awhile while my grandson learns how to drive. I'm willing to buy new/better equipment, but if I don't have to, that's cool too. For sure I'm buying a new charger because 8 hours to charge is just not going to cut it. Wondering if I should go LiPo or just get another NiMH battery. I have read that LiPo's can be recharged numerous times in the same day. Does that mean NiMH's can only be charged and drained once per day? Any ideas and suggestions would be appreciated.