All my Lipos have been shipped USPS Priority, which is by air. Any battery can be a fire hazard, and nothing I've ever seen says ground shipping only for batteries.

IMHO, the best LiPo charger is the Astro 109...fully computer controlled and does a perfect charge every time. Needs a power supply - I use a golf cart battery. Also, the SuperBrain 969 is NOT a proper lipo charger even though it advertises such.