Yocan Evolve Plus Battery for Wax Pen, 1100mah larger battery capacity. When using evolve plus battery the first time, make sure the device has been fully charged. 3~4 hours are in need for it's charging, and the red light dismissed when finish.
Source: https://yocanevolve.home.blog/2018/10/3 ... s-wax-pen/
How do you know when the Yocan Evolve Plus is fully charged?
Plug the micro USB plug into the bottom of the battery, just below the "Yocan" logo. Plug the large USB plug into your computer that supports USB 2 or USB 3. A small red LED will light immediately, and stay on while charging. When the charging is complete, the LED light will turn off.