I'm looking for a charger that can quickly/safely charge; 2s 30-40c, 4000mah-5200mah lipo's for less than 1 hour a charge. I currently have a standard Ripmax ac/dc lipo charger, and it takes about 70mins to charge and balance a pack at 5amps, that being the max charge rate on that charger.

How can I decrease my charging times? I only have 1 lipo charger at the moment, with 4 2s lipo packs. On practice days, I would like to spend all day at the track, with little battery downtime.

Thanks.