What battery are you using? Where did you get it (i.e., from a "trusted vendor," or else "it's probably a counterfeit")
*it's "probably" not, but for safety's sake, you should treat it as though it might be, unless you
know it's not. So, we here have a short list of "trusted vendors," and anything that can't be traced back to one of them, we treat as a possible fake. I don't know the full list off the top of my head, but a few of them are:
liion.com - Li-ion Wholesale
illumn.com - Illumination Supply
rtdvapor.com - RTD Vapor
...there are at least one or two more, maybe someone will chime in with their names/websites. I've ordered from illumn twice, as they've had the best prices on what I needed at the time, although I did have to wait for them to restock the items one of those times.