Originally Posted by MrMaxwell

Those are regular sized 510 batteries... 300mah I think they are
The kit is not a bad deal, though, because it comes with the charger and TWO real Joye 510 atomizers... and a box of 5 cartridges..

In that kit your two real 510s are worth $8x2= $16 ... Batteries are worth what $15 apiece so x2= $30 ..... So you're at a $46 value without the charger which is worth another $10+-. Not bad at all.

I still recommend getting a Hello 016 battery since they're 1300mah and last all day on a charge. Or even the Ego is 650mah and just a hair slimmer.