I've got one that I've been using for work for a couple months. Not enough heat to warm a garage in a hurry to shirtsleeve conditions, but fine for taking the chill off. It's much more convenient that the KeroSun type heaters. I haven't tried it with the 1.5 Ah battery, but any of the other sized Lion batteries will outlast a 1# cylinder. I've been refilling the little tanks from a 20# grill tank without issue for cheap$$.