Originally Posted by biz77

50Ah LiFEPO4 batteries can be had for around $100 these days. They are not very large or heavy. You can use this in place of your power supply and utilize the iCharger's regenerative discharging capability, dumping the discharge of your RC battery back into the supply battery to be used again on the next charge cycle. Show up to the track with the supply battery at 70 - 80% charged and you have enough capacity to charge/discharge all day long.