I've ordered a few times from Happy Vaper and always with excellent results (great products, fast shipping, great postal tracking, competitive pricing). So I had placed an order for some extra atty's and some DIY mixing tools, but forgot I wanted to order a battery (the 306a, just to try with my 510s, y'now see what it be like with a short auto). The next day I placed an order for the single 306 battery... and what did I get? Not only my original order placed previously but the entire 306a starter kit (2 batts, 2 attys, charger - the works!) at no extra cost! Unbelievable! I thought it must be a mistake... but read any other posts about the service from Happy Vaper and this just the kinda customer service they provide - far and above beyond the call of duty.
Now a note about the 306a (as a new unexpectedly owner of the a fine full kit). For reference I use the Silver Bullet mod at 6v and I think it's FAIR to compare the two. The pluses and minuses of each device cancel each other out in terms of a satisfying (but obviously different) vaping experience. In short, add a 306 kit to your e-cig arsenal... fully compatible with all 510 parts, dipping is as good as dripping, and it will fit in you PCC - I just cut the rubber stopper that comes with the 306 carts to match the size of a regular 510 bat, carefully place it on top and the pcc with happily charge it.
And jebus, the vapour from an e-cig the size of a regular cig? Simply amazing.
Now a note about the 306a (as a new unexpectedly owner of the a fine full kit). For reference I use the Silver Bullet mod at 6v and I think it's FAIR to compare the two. The pluses and minuses of each device cancel each other out in terms of a satisfying (but obviously different) vaping experience. In short, add a 306 kit to your e-cig arsenal... fully compatible with all 510 parts, dipping is as good as dripping, and it will fit in you PCC - I just cut the rubber stopper that comes with the 306 carts to match the size of a regular 510 bat, carefully place it on top and the pcc with happily charge it.
And jebus, the vapour from an e-cig the size of a regular cig? Simply amazing.
and going to be...just grand. 
