This is a guest post written by Morandir835, an e-cig enthusiast, admin on the Vapor4Life forum, and a regular on their ECF sub forum. Now that Vapor4Life is carrying multiple mods, I think a quick education course is due. There is a lot of talk about various mods in both the V4L  forum and on ECF (Electronic Cigarette Forum), but for those who don't frequent those forums this information will be useful. What is a mod? A mod is a modified ecig  just as the name implies. Instead of it looking like an analog it can range  from multiple sizes and usually ends up  looking like a box (like the V4L Handle) or  a tube (like the OMG All Day). In most instances they have replaceable batteries, though a few sealed ones are on the market. Why do I need one? This question is one of the two  most important of them all. Some people don't need a mod. I know plenty of vapers  who have been using ecigs for multiple years and have moved on to nothing bigger than an EGO, and some who never even went that route. For others, it always comes down to one of three things: longer battery life, more power, or because it >looks cool. The first two reasons are perfectly justifiable. Without the use of mods, I would go through as many as 20 Original Vapor King diamond  batteries a day, and that's a lot of batteries to keep on hand. By adding a mod to the arsenal, I was able to cut that number down to 4-7 "stick" batts. In the case of more power, even the best stick batteries on the market can only go to about 4.15 volts on load. You can get 5 volts of power using a USB passthrough. Variable voltage mods and high-powered  ones allow you to hit those higher numbers a standard ecig just can't. The last reason is the only one you should never buy a mod based on. If you're only getting one because it looks cool, you're going to end up wasting a lot of money in the long run. When to buy one? Here's the other important question. I've seen many people tell new users to just get a mod, because the battery lasts longer, and it has more power, etc. The problem with that is when you're first making the switch from analogs to ecigs, it's not a guarantee that you'll be successful. A big part in the success is having a personal vaporizer that actually resembles the analog. No mod fits that bill. I always tell people to wait at least three months before going into the mod world, and then the next step should be an EGO. Then three months later if you're still going strong, step up to a mod. Don't get rid of all your small batts either, trust me there will come a time when you'll need them. And finally, before purchasing a mod be sure you know all the do's and don'ts with lithium-based batts, especially in regards of charging them. Do you use a mod? How long after switching to vaping did you begin using a mod? Tell us in the comment section below. Contact Morandir835 through his page on ECF  "Even Though I Nothing Learned, With Strength I Burned."  €“ Emperor