Thanks for your feedback.
As for your description, I think this item have some problem.
Please contact the shop after-service. (The shop that you bought)
If you have further question, please let me know.
First of all, thanks for supporting our products.
As for your UNI, have you checked the connection betweet UNI battery and the cartridge?
If you have other cartridges, please try to connect different cartridge with your UNI box mod.
If you have further feecback, please let me know.
I just bought a Yocan Uni yesterday and it was working great and all. But after taking it off the charger, it doesn't power on anymore, unless the charger is plugged in? Is this normal?
I was doing some troubleshooting and looked at the manual, but I didn't see anything about this situation. Any help or suggestions would be appreciated.
Yes, please click the fire button 3 times to change voltage option.
By the way, UNI Mod has three voltage options: Learn more FAQs on this page: https://www.yocantech.com/help-center#UNI