i consider buying a Hello 016 Carto Kit with just one battery to be unwise. I suggest if you buy the Hello then buy an extra battery also.. Rated at 1300mAh it last me ( a very heavy vapor ) about 8 to 10 hours between recharges.. It is rather heavy to hold in your hand for long periods of time.. great for LR atty or carto.. puts out a fairly standard 510 voltage
that box mod is unregulated so about 3.7 ~ 4.2 volts, it's nice to wake up some lethargic flavors and a little more vapor.. it uses a 14500 series battery so maybe 900 mAh for a protected battery and 600 mAh for a high drain battery.. it has an on/off switch so it can be carried safely in you pocket unlike the Hello 016. I use mine a lot. Make sure to buy at least two batteries for it..
I like both of these units but for different reasons for both
Hope this helps
James
July 20 smoked 00 cigs, 40 less than my usual 40 cigs a day 2723 cigarettes not smoked in 78 days by using Stonewall, Joye 510, Hello 016, Ken's BoxMod, MadVapes 2xAA Box Mod, WetBox Vaporizer (ecig) and 19 bottles of ejuice partially used , $0.28 per cig X 2723 Cigs = $762.44 diverted from cigarettes to Vaporizer (ecig). OMG I have spent over $1671.51 in 74 days on this stuff but bare in mind that my old cigarette cost was $330 a month and i have $790 in supplies so $880 in hardware and consumed ejuice
PS: I think you should check Israfil's math, the box mods 900 mAh battery outlasting the Hello's 1300 mAh battery? I very much doubt that.. but the box mods battery does cost about $5 whereas the Hello battery
will set you back about $20 to $25..