Forgot to add - Nitecore MH20 Rechargeable LED Flashlight

And probably the most important thing: I repeatedly read and researched on the internet before plugging the USB charger into my computer. The MH20 manual confirmed USB use with a computer so I followed the instructions. My computer had a 550W power supply and the USB was connected to it. After a couple hours the new Nitecore 18650 Battery (2600mAH NCNL186- purchased separately) did not appear to be taking a charge, so USB was unplugged from the computer. The computer, which had operated flawlessly prior to this, now would not power off. I now find that the computer has apparently 'crashed and burned' as all efforts to salvage it have so far failed.
THINK TWICE BEFORE PLUGGING THIS UNIT INTO YOUR COMPUTER!