Features:Compatible with all standard 510 and eGo devicesUpgraded and stable PCB control headLonger life span for the new upgraded PCB and battery cellLong lasting 1600mAh battery5-click on/off switch All batteries are black, no silver Specs:510 and...

Features:Goostick 320 mAh BatteryPreheat modeAdjustable Voltage: 3.3V – 4.8V15 Seconds Hold TimeFits all 510 ThreadUSB Smart ChargerSmart USB Rapid ChargeAuto Safety Shut offPreserves Battery Cells