For cigarette sized ecigs, 808's are probably your best bet. Bloog is a 808 actually, they are just fancier, newer version of it. I think either way you can't go wrong. If i were to make a specific reccomendation, id either go with kanger 808's from canvape, or V3 808's from vaporus. The V3's are a little bit more expensive, but Song is having a great sale on them. They are the same quality as the volts and bloogs, they have drip resistent battery holes. New vapers tend to overfill cartos, or fill them while they are still on the battery. This can cause them to drip into batteries and ruin them.
With all that said, i'm definitley biased towards 808's, especially the V3's since i use Volts. They are really nice batteries though. Doesn't really matter that your hubby went with the ego-t, its a nice PV, But.. if you want to be able to swap atty's and cartos, 808's have different threads, so that might be something to consider. I'm don't really know anything about smokenv's, so i cant compare the battery life on them. You might want to get a PCC, or extra batteries. Depending on how much you vape, 2 might not last all day.