Ive been looking for alternative
batteries, ever since i've heard stories coutnerfeited sony vtcs. As for the "king of
batteries" go sony vtcs was by far the front runner, by chose to dethrone themselves, for whatever reason, from the vape game. Im very pleased with samsung inr's for they perform quite equivalent to my sony vtc 4's. Keep in mind my sonys are almost a year old.
I also own mxjo 18650, which perform also well. But they dont last as long, compared to the Samsungs. However, I use em on my mech mods, because they do provide a harder initial hit, then the samsungs. I believe its due to the fact that mxjo have a 30A discharge, compared to the samsungs at 25A but what do I know.
I've seen those subohm batteries before at a vape shop. But when buying my new box mod, I decided to go with the Samsungs. Mainly due to word of mouth from other vapors, Samsung is a name brand, and were significantly cheaper.
My recommendation if deciding a new battery...let the dust settle. Overtime, a new "battery king" will reign supreme and only time will tell. But if you must get one now, I recommend the Samsung INR 25A. For harder hitters on mech mods, go with the Mxjo. Just my 2 cents...