Hi I felt like I had to post this, and sorry for the cut and paste. I copied from the site I get my batteries and juice from. hope it helps.
What is an e-cigarette
Units are comprised of a rechargeable battery, an atomizer and a cartridge. The cartridge contains, water, flavor, propylene glycol (PG), and can contain nicotine.
How does it work
When the user inhales at the mouthpiece, a small switch located in the battery is activated and power is delivered to the atomizer. The action is regulated by a microchip which is also located in the battery. When power from the battery is applied, the atomizer is energized and creates a vapor derived from the moisture and propylene glycol in the cartridge. As the vapor passes through the cartridge, it picks up the flavoring and delivers it to the user. The user absorbs the nicotine either through the mucus membranes in the mouth or through the lungs and then exhales an mostly odorless vapor that disperses in seconds.
This means, no tobacco, no fire, no second-hand smoke, no first-hand smoke, no tar, no ammonia. Just vapor.
It's like eating your cake and having it too!!!
Propylene Glycol
Propylene glycol is a food additive found in many foods we eat today. It is used in food coloring, flavoring and also used to keep food, medicines and cosmetics moist. It is considered to be generally safe and it is the element that helps to create the vapor that simulates smoke. For more information on propylene glycol, check out wikipedia
Batteries
Battery life depends on your habits. If you use your 901 as a pacifier and suck on it all day long, youll probably be charging batteries every 1 to 3 hours. If you take the occasional 4 to 5 puffs every hour or so, your battery will give you 6 to 8 hours or more.
Batteries can be recharged 150 to 200 times. So, an average battery will last the heavy user 3 4 weeks, and the light user 6 - 10 weeks.
If the battery gets hot and stays hot, throw it out. You have a fried battery.
If you get only ¼ of battery life compared with when it was new, its at the end of its life cycle.
Do not overcharge your battery. The average battery will charge in 3 to 4 hours, do not leave battery on the charger for more than 4 hours to avoid overheating of the battery.
Atomizer (aka Vaporizer)
n atomizer is considered to be a consumable. It needs to be replaced when vapor volume is noticeably reduced even after a fresh cartridge and fully charged battery have been installed.
Keeping your atomizer in good condition can be a bit tricky. Your atomizer should always be humid but not wet. If it is too humid (gurgling sound, no vapor), blow the liquid out of it. If it is too dry (burned taste, no vapor), deposit one (1) drop of liquid onto the metal mesh in the atomizer.
Cartridges
ike batteries, cartridge life depends on your habits. There are dealers out there that will tell you that 1 cartridge is equivalent to 30 analogs. If you buy from them, get a money back guarantee, youll be vaping free forever. In truth, a cartridge can be compared to approx 7 to 14 analogs, but count on no more than 10. A cartridge can be refilled with juice 4 to 6 times (keep an eye on what the filler looks like because it does deteriorate).
Juice
Juice is the bottled version of the liquid cartridges are filled with. It comes in various flavor (apple, banana, cherry, chocolate, mint, marlboro, .......). It is made up of food flavorings suspended in propylene glycol, it can contain nicotine. Store in a cool, dark place, refrigerate for long term storage for best results, because it is light and temperature sensitive.
A cartridge takes 5 to 6 drops of juice to refresh it. Do no overfill your cartridge, an overfilled cartridge will cause you to suck up liquid into your mouth it really doesnt taste that good, and it can fry your battery if liquid drips down the vaporizer into the battery compartment.
The average user will vaporize around 1.5 ml of juice per day.
WARNING
Keep in mind that while the e-liquid comes in several delicious flavors, it can contain nicotine. It is toxic if consumed in any other manner than vaporizing through your favorite personal vaporizer.
Nicotine can be absorbed through the skin, so please use care when refilling your device and wash hands and bottle immediately after use. Wipe any excess liquid from the cartridge.
Nicotine level (cartridges and juice)
High 18 MG
Medium 14 MG
Low 11 MG
None 0 MG
Main ingredients of juice and cartridge contents (various flavors)
Cleaning cycle
Personal vaporizers have an automatic feature called cleaning cycle. This cleaning cycle is an extended period of atomizer heating intended to revive it. A cleaning cycle is triggered after XX number of puffs. XX varies depending on model. You will notice the light flashing when there is no warning condition happening, (such as it needs a charge or you have taken excessive # of puffs in a short time), and perhaps a hiss from the atomizer. The battery is what triggers the cleaning cycle.
Unfortunately, the cycle will cause your atomizer to produce a noxious taste that has been described as somewhere between burnt chicken soup and hair on fire. This nasty taste does disappear after a while.
Vaping Tips
Keep the tip down, if you vape with the tip up, liquid might run into your mouth.
Most personal vaporizers require a priming drag a short drag to heat up the atomizer in order to produce sufficient vapor for a satisfactory feel.
Give your device time to rest between drags, the harder and faster you draw, the faster your atomizer and cartridge dry out.
Fresh cartridges combined with fresh batteries will give you the most satisfactory vapor.
If it is too cold outside for you, it's too cold for your device, same goes for heat. They do not work in extreme temperatures
Keep in mind that a personal vaporizer is not a tobacco cigarette. They do not behave the same and do not give you the same results. You will need to learn how to use your device.
Troubleshooting
If the LED blinks rapidly for about 20 to 30 times when trying to vape, your battery is dead. Recharge battery for 3-4 hours.
If the LED blinks rapidly while your device is not in use, it has started a cleaning cycle (see Cleaning Cycle)
If after vaping for some time theres no more vapor, your cartridge needs changing or refreshing.
If you put on a new cartridge and experience hardly any vapor, your battery might be less than optimal. Charge the battery.
If a fairly new cartridge and new battery give you less than satisfactory vapor, put your finger over the air hole on the atomizer and blow steadily into the cartridge. This will send the liquid down in the direction of the atomizer. Do this a few times. If it still isnt right, top off the cartridge with a couple of drops of juice.
If the vapor has a slight burned taste, your atomizer might be too dry. Take off the cartridge and put 1 drop of juice on the metal screen of the atomizer. Put the cartridge back on and try again. (Do not deposit too much liquid, it could short-circuit your battery)
If there is hardly any vapor and you hear a gurgling sound while drawing on your ecig, your atomizer is too wet. Take off cartridge and battery, blow through the atomizer from the battery end (hold it over a paper towel or something else that will absorb the excess liquid), reinstall battery and cartridge and resume vaping.
Do not get dust, dirt, sand, lint etc in the airhole of the atomizer, always keep your device in a case or bag when not in use. If the airhole gets blocked, youll need a new atomizer.
If a freshly charged battery does not light up the LED, the switch might be stuck. Lightly blow through the battery for a couple of seconds, this sometimes frees up the switch. You could also try tapping it against a hard surface. Reassemble and try again, if it still doesn't work, dispose of the battery and get a new one.
Nicotine
A few people have reported symptoms of nicotine overdose (including myself). Some of these reports were from seasoned heavy smokers who were used to nicotine levels from cigarettes.
It is possible that while vaping we absorb more nicotine than we were used to with cigarettes. Learn to recognize the signs of nicotine overdose and abstain from vaping untill symptoms disappear. (See nicotine safety sheet)
WARNING
* Nicotine is a highly toxic and addictive substance * Electronic Cigarettes are intended for ADULTS only. Electronic cigarettes are not to be used by anyone under the legal smoking age of the state they reside in.
* Those who suffer from heart disease or high blood pressure, are pregnant, nursing, or those thinking of becoming pregnant should not use nicotine based products.
* Those allergic to nicotine or propylene glycol based products should not use the electronic cigarette.