[lincpimp]

If your lipos shrink back down after sitting they are still ok to use, but I would not suggest using them in a higher amp draw situation again. Anytime a lipo puffs up, some of the internal chemicals have out gassed, so you will have either diminished capacity, performance, or both. The 6000 MA packs are good for about 70amps cont, and maybe 100amps burst. They are great packs for a 10th scale 2wd truck or buggy, and make a killer roto start/ez start pack. That is what I used to use my 6000 MA packs for. As far as running a MMM/2200 combo on 4s, you will need a better lipo, like the enerland 5000 25c series, or the new hyperion g3 lipos.