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. Don't treat it as a disposable rag, to leave it everywhere each time after used.
For more info, please go to Yocan evolve plus page.
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.
If you have any further questions, please comment below.