That's a shame. And yeah you can never return carts or
juice - it's a safety factor.
A good rule - don't trust any "Name" brand unless you know what Chinese model it really is and multiple people here say it is an OK model and brand and price
There are great starter models and there is a lot of crap out there too
100mah is about 1 hour of moderate
vaping
Look at manual Joye 510 (180mah) or Joye 510 xl (280mah) (and this is NOT Joyecigs.com - that is not the same and a nasty attempt to confuse people into thinking it is). I use Manual Joye 510 as a 2-piece with Boge standard resistance cartomizers I fill myself
(see Liberty-Flights.com, LiteCigUSA.net, Cignot.com)
Also look at KR808D-1 (a dedicated 2-piece model) manual models - basic at LiteCigUSA.net, fancier at Vapor4Life.com or Smokeless Image's Volt. These use prefilled cartomizers and you can keep those damp with
eliquid and get 4-10 days use out of each. I recommend the 280mah standard manual battery. There is also a 180mah shorty manual. I use these with Vapor4Life blank cartomizers.
I use thin high-PG juices in both of those
Those are the two most popular and well-supported slim ecigs. They are a bit thicker than a cigarette (9.2mm). ANything that is actually as slim as a cigarette is not good.