Summer, Clearo's will work on ePower. I used to use nothing but Clearo's on all my PV's. But, decided to switch to Tanks, or larger volume Clearo's. GotVapes has a newer version of their VISION, 3.5mL large volume Carto, it's called the Deux. I've been using both versions for a week or so, (on ePower). Reason I switched is the XL Clearo's just don't last me a workday. The VISION/Deux will make your 14650 ePower just a smidge over 7 inches long. You won't be able to use your regular cone with the larger Cartomizer's, (unless you're willing to modify it). The Deux is easier to fill than the VISION. Both cartomizer's are essentially just larger C-E2's. If you don't need/want the greater quantity liquid, a regular or XL Clearo would work fine on the ePower. The regular carto won't leave much tip sticking out past the cone. You could always add a Drip Tip/mouthpiece. JMHO
Cheers,
otrpu