I like my eGo-C batteries. I have 4 - 1000mA and 1 - 1000mA twist. Since I travel a lot and am out in public I think these are good for not freaking people out. With the CE tanks and others that are the same diameter they aren't intrusive and easy to pocket. I've been using the same batteries since February without a problem, knock on wood. I do get a lot of questions from people during my travels and I think it would be discouraging to non-vapers to want to switch from analogs to digitals if it looks to cumbersome to vape.