I was vaping til my battery was real low, and was warning me saying weak/low battery, so I plugged the usb into my PC as I do... The red light started flickering and then went off completely, I put a samsung 25r in there and it glows red, when I put the red one (that comes with rdna40) back in, the light doesnt turn on at all. I just got new juice so I was chain vaping for like 20mins straight trying out all these different flavours, so battery was a tiny bit warm but idk shit about this stuff. Is my battery stuffed/unsafe?