ORIGINAL: bencav84
Take into account though, that unlike a glow engine, when the battery is dead, the day is over (ok, same with the rx pack in a glow setup, but a filed charger takes care of thet one!!)
There are field chargers for LiPos too, so that's really not an issue. Of course, depending on the size of the battery, charging time will be between 45 minutes to two hours.