These are cigarettes that are a bit bigger than the 'minis' about the size of a '100'. The advantage here is that the batteries are bigger and more powerful, so they last longer before they need to be re-charged. Althought these batteries do last longer, you still have the option, with some of them, of a charging case, which gives you even more flexibility.
The JAC 'XL' kit for example gives you two batteries and I think you should buy a third - with three charged batteries and a charged PCC, you are good to go for the whole weekend, without needing an electricity supply (remember to take enough e-tips or e-uice with you too).
The excellent 510-tank from eXhale
