This USB charge cord will fit most buttonless and variable voltage pen vaporizers using the standard 510 thread.
Please keep in mind that batteries should NOT be left charging after they have been replenished: this can damage your battery and drastically reduce its lifetime.
1) Input: DC 5V
2) Output: DC 4.2V = 420mA
3) Suitable for 510 battery
4) Powered by USB port