Copied from another post I made (I'm lazy tonight):
After almost a year, all I can do is tell you what works for me:
1) Ego 510 XL 1000 mah battery from puresmoker.com. I can't seem to find the 1000 mah anywhere else. I've tried the 650s, 900s and 1100 mah batteries from various vendors and the ones from puresmoker just last. I think I still have my original from 6+ months ago. I am a chronic vapor. I get about 5-6 hours out of a battery. I use three batteries in rotation so I always have a spare ready to go. Make sure you get a charger to support the bigger battery. I have found the USB cable for a wall charger from litecig far superior to the one that comes with a puresmoker charger. Maybe order the whole wall charger and cable from litecig?
2) Dual coil cartomizers. Greatest thing since sliced bread IMHO. I did the SR and LR cartos and the DCs leave them in the dust. Good TH and vapor and they don't burn and become useless if you run them dry. I run through about 4 of those a day but I vape constantly from my early morning coffee until when I close my eyes at night.
For me, it's all simple and easy. I don't have to fool around much with hardware during the day, just vape my head off.
Good luck.
Puresmoker is out of the 1000mah battereis but I found some at Cignot.