The EGO twist 1100mah battery is a powerful long lasting battery that is ideal battery for vapers that like to control the power of the vape. The EGO Twist 1100mah offers a variable voltage performance through twisting the little dial at the end of the battery. This dial will allow you to choose from anything from 3.2 volts to 4.6 volts. One of the benefits of using a twist through battery is when your atomizer is at the end of its life you can, by twisting up the power, get another few days or even a another week out of the atomizer before you replace it. Battery performance is around 15 hours use of heavy vaping and it takes around 4 hours to charge.