Guy, welcome to our sub forum and thanks for reaching out to us! I'm BHam or Brandon, the Social Media Community manager for V4L. I'll let you know the difference between our different sub brands

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The Classic VK or the Vapor King Classic is our line of batteries that look most like an analog. They come in a variety of colors and have an "ash cap" LED tip. On average these batteries will last you 2-4 hours of use time depending on what size you get (Short ~ 2 hours, Regular ~ 3 hours, XL ~ 4 hours). These are a great place to start if you're looking for a simple starter kit.
The Original Vapor King or Vapor King Original is a newer line and has bright bold color options and bejeweled LED tips. These are stylish batteries that have an updated battery cell and offer up to 6 hours of battery life. They will function the same way as the Classics for the most part. It's important to note for this line, the manual battery option for this line is slightly longer than the automatics and the Regular and XL battery options don't fit into our carrying case.
The Vapor Titan line of batteries are our newest line and have an updated battery cell as well that is exclusive to Vapor4Life. Unlike the other two options, these offer a premium finish and have a soft touch, velvet coating that feels great in your hands. They also don't drop off as much as regular stick batteries. While some batteries will drop down to around 3.3 volts or 3.4 volts , the Vapor Titan batteries keep much of their power, only dropping to 3.5 to 3.7 volts. Most traditional stick batteries come off the charger at 4.2 volts and the lower the voltage level, the less of a throat hit and vapor production you'll get. So these batteries keep their power for a long time. You'll get similar battery life with the Vapor Titans that you get with the Vapor King Originals.
If you're looking for a kit that will get you everything you need, I'd suggest between the:
Original Vapor King Ultimate Starter Kit, which will include a USB passthrough for vaping without worrying about battery life, and a USB charger for charging your batteries on the go. It also includes, of course, two Vapor King Original batteries, a 5-pack of cartomizers and a carrying case.
Vapor Titan Standard Kit, while it doesn't include the USB accessories, it will include another pack of cartomizers. The extra pack will definitely benefit you, if you're looking to try out the many flavors we have to offer.
You can reach me directly at
brandon@vapor4life.com with any other questions you may have

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EDIT: I forgot to add, all our hardware is 808D threaded, so if that charger is an 808D thread and has over charge protection, it should work with our batteries. If not, we offer a PCC here:
http://www.vapor4life.com/vapor-king-portable-charging-case-4103