I second the other poster on Wismec equipment, they won't get any more of my money!
I'm not a fan of non-replaceable battery devices, why throw the whole thing out because a $10 battery died?
IF you insist on USB charging take a good look at the Eleaf Istick Pico, around $30, replaceable 18650, 75 watts, TC, etc, but has also been tested to have one of the better onboard charging systems. The DNA boards have the best.
On batteries, buy high amp, Sony Vct4 or 5's, LG He2's, something with a 25 amp draw, it will say in the description. Buy them from RTDVapor and have NO worries! Buy at least two for a single battery mod, four for a dual battery mod and get a charger from them as well. This way when the battery goes dead you can swap and vape on, you'll thank me later!!
As for chucking clouds, the Smok TFV4 with a triple coil should be a decent start. As another said, it's not really my thing so I'm not a great deal of help.
Don't be afraid of batteries and chargers, just treat them with respect and buy the best you can from a reputable seller, RTDVapor (getting the hint lol!) and all will be fine!