On refilling.....first things first...are the 2 bottles of liquid the same flavors as some of your pre-filled Cartomizers?
Refilling is very easy, simply remove the white rubber stopper from the Cartomizer, you can use your fingernails, toothpick or a paper clip. Simply hold the cartomizer at 70 degree angle and apply the droplets on the inside of the cartomizer casing allowing the liquid to absorb into the polyfill material.
The Cartomizer basically has 4 items inside of it: Polyfill Material which surrounds the wick and absorbs the liquid. An atomizer which is the heating element wire, a cloth wick which surrounds the atomizer, and an air tube which extends from the battery hole and rises about 5/16th of inch or just about to the top of your flavor lettering on a pre-filled Cartomizer.
In-use Cartomizers can be topped off multiple times, that is to say once the flavor or vapor starts to fade you can add 8-10 drops into the cartomizer for further use. After multiple uses resin will build up on the base of the cartomizer surrounding the outside air tube, when that happens vapor production will be affected by 80%, you may notice the Cartomizer becomes more difficult to draw off of.....that Cartomizer will need to be cleaned.
Once you get your bottles of juice, just post up that you got them and we'll help you with the rest.
Now, since we are talking about stuff that you don't even have yet allow me to take a moment and suggest a few things.
First of all, keep all of your used cartomizers, there are very easy and effective way to wash them out, remove the old flavorings are re-use them (30) mulitple times. I would suggest at some point that you buy 3-4 Drip Tips. Cartomizer tend to get hot when chain vaping or on Passthroughs, the Drip Tips will absorb the heat instead of your lips, give you a much better draw, and will be very convenient when the day comes that you start juicing full-time instead using pre-filled Cartos.
Blank Cartomizers: V4L sells blank cartomizers, there are 2 types Wow & Premium Cool Cartos. Wow Cartomizers have a low resistance atomizer which makes them produce a warmer vapor, however they tend to heat up. Premium Cool Cartos vape a little cooler, last a little longer because they are 1/16th of inch longer (More juice) do not draw as much energy from your batteries as a Wow Cartomizer, and work better on your Passthrough because they do not heat up as much as a Wow Cartomizer would.
Passthroughs: Never leave your P/t plugged into your computer or 12v/adapter unless you are using it. For instance don't leave in your computer overnight....there have been cases where they have heated up on their own....like burning melting heating up. Like all mass produced items some have shorter lifespans that others, but those are in the minority. I have 2 that I use all the time, 1 is 2 months old and the other is 6 months old, both of them work great.
Your P/t can be your best friend, no recharging, no battery fade and every vape is bliss because you are vaping at 5v instead of the 3.7v which you have with portable batteries.
Now I have all 3 sizes in both manual and auto. Short batts are great for stealth vaping and handy when you just want to keep it in a pocket. Both regular & short batts are 280mAH and will last 1-2 hours with chain-vaping and 2-3 hours with moderate vaping. XL batts are 380mAH and will last 4-5 hours with moderate vaping and 2-3 hours with "look it's my new pacifier" chain vaping.
I think you will really enjoy your regular sized batteries, they are great. Some people will say they prefer XL's because they last longer, while others find them too long and not preferrable because they don't work with their pcc. (too long)
It's easy to get carried away spending money, I would slow down a little, your good on equipment for now.
I'm going to take a break now......absorb what I've said...I'll check back for follow up