510 battery and 510 cartridges come in many different shapes, sizes, colors, capacity and features. Most 510s have the cartridges screw on to the top, you push a button and you inhale. Some higher end 510 batteries allow you to screw your catridge onto a magnet which then easily slips into the unit. It then has draw activation which means you just inhale, no buttons, just breath in when you want vapor.
Super simple, very portable and ultra quick.
For save time on the go at a reasonable price, the 510 fully delivers.