I had exactly the same issue, I started with a blu stater kit from my local Walgreens and was hooked, but after my first week or so of use. I noticed that the battery would die quickly or it must have been my vaping style, I was charging the little blu so much I would have one batt on the USB charge and the other batt in the PCC that came with the stater kit. I did some research which I should have done in the first place and learned that the little blu batts are only 88 mah. I checked out the Joye 510 kits cuz' I loved the idea of the PCC but when I checked those out, they turned out to be only 150 mah for the manual batt and 220 mah for the auto batt. So that meant the Joye 510 kit batts would last twice as long or a little more than my blu. Also I was charging my blu batts 5-7 times a day. With all this said I really like the idea of the tanks and clearomizers out there, did ALOT more reading on here. With me finally settling on a Joyetech Ego-c Passthrough with a vision clearo on it, and let me tell u I fell in love. No more charging all the time now I only have to charge my batts one every other day now. And I opted for the Passthrough because I liked the idea of being able to vape while my batt is charging. That's my two cents and I hope this helps, if I would have done some research before I could have saved $60 on the blu kit that is sitting in my closet rotting away lol and would have been able to use that on my next investment, An Ego-C Twist with a charger.