I have asked the same questions. As i understand it, you need an atomizer to drip. there are no atomizers designed for an 808. that gives you two choices: 1. get an adapter for a few bucks so devices designed for another thread (510 has the most options) can be used with your 808 batts. 2. get a 901 atomizer, which can be used with a manual, but not an automatic, 808 batt.
Problem, you probably need variable volt capacity to fully enjoy the dripping experience. There are no VV 808 threaded devices.Therefore the only way to fully experience dripping is to get a VV batt, e.g. a 510 threaded ego twist (which doesn't give you a full range of voltage but should give u a good idea what it is like) for $20 or $25, a charger and an atomizer for $5 or $10 apiece, and adapter for a few bucks so you can use the twist with your 808 carts. Best case about $40 plus postage for the bare minimum set up. The atomizer might only last 1 to 3 weeks.
you may get hooked on the 510 experience, go for a higher end VV
device for $50 to $150, rebuildable attys for $15 to $20 each and maybe experiment with
tanks and all kinds of exotic devices. You may end up building your own mods and opening an internet store.
I'm not there yet, you may have guessed that i've shopped online, in fact, just a few clicks away from taking the leap. I've gone in another direction for now. i've started making my own juices, with a preference for high Vg juices. this means i'm cutting my
vaping costs instead of increasing them. Anyway, I always was better at cooking than mechanics.