well it's true that it'll be better at the begining and last shorter periods of time the longer you have it...
but that's common with ANY stock ecig battery...because the truth is that running the atomizer or cartomizer will overstress the battery and it'll gradually lose some of it's ability to hold a charge until it eventually wont hold a charge anymore.... but that's true of any stock battery as well as lots of the cheaper mod batteries as well...
the 510 does have XL length mega batteries...but I didn't mention those as you were saying that you wanted to keep things about the size of a cig and the XL batteries (both 510 and KR808d-1) push the length out to something closer to a pen...
but that's common with ANY stock ecig battery...because the truth is that running the atomizer or cartomizer will overstress the battery and it'll gradually lose some of it's ability to hold a charge until it eventually wont hold a charge anymore.... but that's true of any stock battery as well as lots of the cheaper mod batteries as well...
the 510 does have XL length mega batteries...but I didn't mention those as you were saying that you wanted to keep things about the size of a cig and the XL batteries (both 510 and KR808d-1) push the length out to something closer to a pen...