Volt is very good. I like their juices and their 808 cartomizers very much.
That said, their
batteries while good are also quite expensive. ~25% more than very similar batteries. Best battery I have is a volt, but the one I just ordered is not, and price is the reason. They are good but perhaps not that good. Also the only way to get a charger from them seems to be to order an entire starter kit.
That's not the worst idea but I will suggest another possible option. Since you specifically asked for a charger,
KR808D1_USB_Charger $4.95. This charger is the best I have found so far (dont have a volt since they dont sell them separate) and has worked well for me. Batteries from the same site are $9.75 for the same size volt charges $12.95 for, this site lists 280mah capacity while volt, amazingly, criticises other suppliers for not informing you of actual capacity yet do not seem to list it themselves. I have both, they perform very similiarly. The volt has a tacky feel to it that might make it a little harder to lose your grip on the thing. MVS also has an XL option on the batteries, $12.75 for 380mah. I just ordered one so obviously I believe it's the best buy on batteries.
On the downside, the SI cartos are clearly better (enough so I wont quibble at all on the price,) and while juice taste is subjective I think SI is better there too. There are coupons around for 10-15% off from both. It all depends on how much stuff you wind up ordering whether it's worth it to order from two places or save on shipping by only ordering for one, but the price difference on the batteries and charger could well wind up making it worth it to do so. Your call.