well, my oppinion about mods is that only the 18650 ones are worth investing since the batteries will last you longer. i don't care about displays, vv / vw and stuff and if i get a mod, it'll be a mech, but then again i vape with a 1300 mah "fatty" ego bqttery now that keeps a high voltage for a full day and is as long as a standard 900mah so in terms of size andweight it wins over any tech mod. if my shop stops selling the 1300mah fatties, i might consider a mech but i don't see the reason for carrying such a big thing in my pocket when i get a full day of intense vaping from my ego.. a battery costs 15 bucks and it's electronically protected so..