I have the greatplanes poly charge and the duratrax ice charger, so I can charge 5 lipos at a time. I can go to the field, fly five packs, let them cool. Throw them on the charger and by the time i finish the other five packs, i only have to wait about a half hour till i have another five packs and then repeat! Its great, since im the only one of my group that flys helis, every one else does the nitro planes (which I do to) i can litterly fly for hours. Plus, my 3s 2100 packs also work great in my greatplanes extra330s so i can fly the planes and helis, and when the batterys are charging, i put out the good old slimer, or rc cars. I got it made[8D] lol.