Honey Stick Twist Action Variable Voltage 510 Thread Battery now available in BLACK/GOLD. Dial into your voltage with the silky-smooth twist knob at the bottom of the battery that allows you to adjust between 2.0 Volts and 4.0 Volts. When connecting your device to a charger that came with your Honeystick device for best results. If your charger needs to be connected to a USB source please do NOT use the following charging methods or it may harm your battery or not charge it properly: laptops, rapid chargers, power banks, or Apple products. Standard Android, Blackberry, Amazon, or generic wall adapters and desktop computers are good charging sources for the USB plugs.