The Joye 510 is likely one of the lightest of good e-cigs, but with the lack of weight comes poor battery life. A 510 will last me about 2 hours so I upgraded to a bigger battery with the joye eGo which lasts me around 6 hours between battery changes. I am a pretty heavy vaper so some people get more. Once you get away from the fact that you want your e-cig to be like a reg cig you will end up with a heavier battery because you like it to last longer and for me, it only took a day to get used to it.