Well, bought some $40 versions of a boat, a tugboat and also el cheapo amphibious car (morphibians). Maybe it is time to get serious. Anyway, first simple upgrade is a battery pack that keeps its charge and doesn't require 4 hours to charge. What you need is a $11 NiMH battery pack not a NiCD that they ship with an a $26 intelligent charger that cuts the time from 4 to 1.5 hours. All-battery.com has both!