Review on 2000Lumen Rechargeable LED Flashlight: Magnetic With Cob Sidelight, Fast Charge, USB Output, Zoomable & Waterproof - Ideal For Camping & Emergencies by Daniel Steele

Really wanted to like this flashlight and it hits all the major requirements: zoomable, rechargeable, COB function including red SOS, and magnetic. On the paper, this flashlight is an absolute home run. However, that was not the case when I got them.One of the flashlights did not work, (2nd flashlight worked flawlessly). It turned on briefly but it would not cycle function or turn off. After hitting the power button multiple times, it finally turned off but it would not turn on at all. It does not appear to be battery issue as power bank function worked and it recharged but still would not turn on.Initially was going to get a replacement and call it a day but decided not to after brief long pause with the fact that battery was non-recharageable. Specs states it comes is built in 18650 battery that is 1200mah capacity. That is the main critical failure of this flashlight. Battery capacity is not much, to begin with (you can purchase Panasonic NCR 3400 mah 18650 battery) and overtime 18650 battery will ultimately degrade capacity mah. And because 18650 battery is nonreplaceable over time it will get worse and run time will degrade. My guess is built in 18650 is no name cheap Chinese 18650 battery. Also as per any cheap Chinese flashlight, lumen rating is insanely exaggerated, no way this flashlight is 1200 lumens (more like 300 lumens).