I think density per volume is similar, but density per weight is a little less from them being heavier. They should work fine in plenty of portable situations,

I think density per volume is similar, but density per weight is a little less from them being heavier. They should work fine in plenty of portable situations, not everything is a drone. Power tools, universal battery packs that offer AC, USB, etc., scooters, motorcycles, and all sorts of other stuff should work very well. Even golf carts and some scooters use lead acid batteries.