Here is a question from a Yocan fan:
Hi , A few months ago I bought a yocan evolve plus XL .. I really liked it but for my battery doesn’t want to work and I tried to take it back where I bought it from and they weren’t able to get it to fix either
Please share us more detail about your device, does it turn on by 5 clicks the fire button?
Or please fill out the support form on Yocan official site to claim warranty.