The batteries in my proprietary cig alike kit I got for my birthday last month have bit the dust. Well, ok, one has, the other is 'iffy'. I ordered some replacement KR808 batts from Litecig. Wow, first of all the replacements were a LOT cheaper than the 'original kit' ones, and second, I think they have more oomph. Power, whatever you want to call it. They also last a LOT longer before needing charged. It's a whole different cig alike experience, for the positive. Still prefer my eGo with clearo, but I have all these 808 prefilled carts that need used up. Better flavor, better throat hit, just over all better. Glad the el cheapos died!