Are you newbie for vape cartridge? If so, please read this thread about the vaporizer cartridge device blinking solution.
Here is a question from one of Yocan UNI user.
Hello, I recently purchased a uni yocan battery and after charging it for 2 hours when I take it off and press the button 5 times nothing seems to happen

Answer:
Thanks for choosing our product.

The Yocan UNI light shut off after charged one hour, means it is fully charged.

And for the blinks 5 times, means the battery can't detect the vape cartridge.

Here are some tips for you.
1. Use a q-tip with Isopropyl alcohol to clean the contact point.
2. Please loosen the vape cartridge a little bit.
3. Please switch the vape cartridge or adapter to have a try.