I came back to vaping after a couple of years away from it. So I chose a new mod -- the highly touted Vaporesso Tarot Nano. The thing worked great, until the last few weeks. The mod began showing it was charging without being plugged in. I tried cleaning the USB port. That didn't seem to make a difference. Other than the incorrect charging display though, it still worked fine: vaping, charging, no problem. Now I charged it for a couple hours. And nothing. The battery shows zero charge. Have I just over-vaped a non-replaceable battery? The worst part was I looked up when I got this mod ... just 6 months ago. My next mod will have replaceable batteries.