Question about , lipo's amps, and fast chargeing

I know it's safest to charge lipo's at 1c but I hear about (expensive) packs that can be charged at 3,4, and 5c which is really fast. However the packs I can afford (sky lipo, blue lipo, turnigy) make no mention of what the fastest charge they can take is so I'm wondering how you find out if the battery seller doesn't say?

For example, What would happen if I charged my new sky lipo 2200mah 40c 3s packs at 4.4 amps? Would they explode? would they heat up? Would it drastically shorten their usable cycles? Any info on this subject from you guys that know lipos would be great

I ask because I just got my new Icharger 306B which can charge at up to 30 amps (more like 20 max with the 600 watt atx power supply I'm using) and a paraboard to go along with it.