It should be used with lithium batteries and has a switch on the side so that you can change it so that it will charge 3.0 rechargeable batteries in it as well. Make sure that you check the setting each time that you use it though, or else it could damage the batteries. It is capable of charging any 18650 batteries as well as 10430, 10440, 14500, 16340, 17670, 18350, 18500, 18650. It has an input range of 100-240 volts and a DC charge rate of 4.2 volts. It is essential to have a battery charger to work with your e-cigarette. It will need to be powered with a battery and most will come with a rechargeable one. It is much cheaper to use a rechargeable one as well as you do not keep having to buy new batteries all of the time. You may also want to consider the Efest SODA dual battery charger as it supports 1A charging and will cut your recharge times in half but maintain a small form factor and highly a competitive price point.