I got Nitecore F4 few years ago. Very nice powerbank in theory, works with 1 to 4 18650s, doubles as a charger, smart management, display, two 10W outs…
I didn't use it that much and usually put charged batteries before use as a powerbank and remove it after recharge. Last time I've used it maybe 1-1.5 months ago and left with full batt set in it. Yesterday needed powerbank, tried it but on/off button was doing nothing, display was out. I thought about resetting, trying new batteries and checked ones that were installed. So, ALL four batteries are completely DEAD. Charger was detecting some as 1.5V yesterday, today not even that.
So, if you have same powerbank, I'd check it and rather keep it without batteries at all times.
I have few Nitecore flashlights, gave few as a presents as well and was generally happy with the brand (although TINI2 IP rate turned out to be overrated), but now…will rather stay away from it.
by Emergency-Depth3867
