I have 8 Lipos. A 1700mah 3is the biggest. I use a hobbico MKII to charge them all. It charges all 3 types of batteries and I love it. All you set is the type of battery youre charging and it automatically senses how many cells then It beeps like 10 times when its done charging. I think it charges thm to 85% which is for safety. I never had any probs with it at all. You can hook it up to a car battery for charging on the field but I bought a power pack that plugs into the wall for it. I think I paid 45% canadian