The Joye eGo-C Variable Voltage Batteries in 650mAh, 900mAh and 1000mAh. The eGo-C Twist battery is another advanced version based on the eGo-C original battery. joyetech has modified the circuit to enable the adjustment of the output voltage from 3.2V to 4.8V in increments of .2V. With smart Buck-Boost converter inside, you can spin the knob at the bottom of the battery to adjust the output voltage to meet your needs.
