* 650mAh Li-polymer
* True 3.2V-4.8V Variable Voltage
* 5-clicks safety cutoff.
* Short Circuit Protection
* Battery Monitoring/Over-Discharge Protection
* Completely compatible with the eGo series atomizers(eGo, eGo-T/-C/-W, eGo CE4/CE5/CE6, Protank, H2, and other eGo series models).

* 1100mAh Li-polymer
* True 3.2V-4.8V Variable Voltage(in 0.2V increments)
* 5-clicks safety cutoff.
* Short Circuit Protection
* Battery Monitoring/Over-Discharge Protection
* Completely compatible with the eGo series atomizers/ cartomizers/ clearomizers (eGo, eGo-T, eGo-C, eGo-W, CE4/CE5/CE6, Protank, H2, and other eGo series models).

* No Li-ion battery, just USB passthrough
* True 3.2V-4.8V Variable Voltage
(4 clicks Button to cycle through voltage options: Blue LED:3.0V, Purple LED: 3.6V, Red LED: 4.2V, Green LED: 4.8V)
* Short Circuit Protection
* Completely compatible with any atomizer with eGo/510 threaded connector(eGo, eGo-T, eGo-C, eGo-W, eGo CE4/CE5/CE6, Protank, H2, Nautilus, Arotank, and other eGo/510 series models).