[MadMax]

There really isn't much reason to exceed 1C with Lipo in airsoft applications. If you have a big battery, you shouldn't need a recharge for the rest of the day. RC models with high duty cycles aren't very much like airsoft. Getting several flights a day is facilitated by pushing 2C charging rates, but you're going to lose on battery cycle life pretty fast if you let it get too hot to touch. Lower threshold of pain is about 50C (120F). Lipos start to take thermal damage at around 60C (140F) where they start to roll into thermal runaway. Throw that battery into a bomb bag and you'll reduce it's ability to shed heat.

1C means about 1hr. Is that really too long? If you care about your expensive Lipos, charge them gracefully at around 0.7C (or lower) the night before a game. Shoot to your hearts content on gameday, then put them in a ziplock bag and toss them in the freezer. Industry storage practice for long term Lipo storage is to store them in sub zero temps at 30% charge. Lipos kept at full charge capacity suffer higher capacity degradation. Letting them drop below voltage due to self discharge does the same.