Oh, so this sounds like the tension in the spring tab on the bottom of the battery chamber has lost strength. That is one way to go about it. If the issue persists, feel free to DM me so we can walk through other possible solutions.
Thank you for reply. May be that issue can be solved without cooper plate in battery's chamber? I can disassemble the device if you know what the reason of the problem.
I can also say about spacers. I don't have it and it's very sad because my friend has a vapor with spacers and I can say that the vapor with spacers is awesome than without.
He has only 3 minutes session but to exhaust herb he needs only two sessions (sometimes 1) on the other hand I need more than 3 sessions with 8 minutes per session. I know that chamber of iqc is bigger than friend's vapor but not so much.
He has metal spacers but I can't buy the same for me because of the country I live. I can buy only zirconium or glass spacers and I assume that metal spacers don't suite for iqc.