Manker MK41 1600 Lumens Neutral White CREE XHP35 HD LED Flashlight Compact Searchlight Power By 4x AA / 4x 14500 Batteries (MK41 HD NW)

One of the best 4 AA lights you can get and that includes the performance and the runtimes along with the simple breakdown of lumen settings and the overall build and the AA battery function and the distance this light shines, this light is pretty much the same quality and reliabillity as the Fenix, Nitecore, Thrunite and Lumintop models and thats saying somthing! Overall im not only well pleased with this flashlight but extremly happy with it as well, thanks Manker.

This light offers capabilities to the user simply not available 5 years ago - 4xAA, NiMH/Li-Ion capability (possibly also lithium-primary but surely not alkaline due to peak power requirements), 1500/2000 claimed peak lumens, reasonably long runtimes, multiple modes, reasonably good light quality for a flashlight, decent build quality, all for markedly less than a C-note.The mode-switching takes a little getting used to, but is ultimately fairly intuitive. From off, a rapid/short press activates moonlight mode, a normal press activates the last primary mode (moonlight, low, medium, high - all reasonably spaced), and a double-press goes straight to turbo. In primary mode, a normal press moves up then down brightness levels. A double press cycles to turbo, normal presses cycle through strobe, SOS, beacon, "dragon breath" (slow pulse of the switch backlight), then back to primary mode in moonlight. The switch itself has a handy battery indicator, cycling blue/purple/red to indicate state of charge. All of this might sound a little complicated, but it is explained in a diagram that comes with the light and ends up being fairly intuitive in use.A quirk when using 14500 Li-Ion cells is the lack of a moonlight mode: the primary mode set is more like low/medium/high/turbo "lite".The battery compartment is a little different from most multi-cell lights I've owned. Their is no carrier - instead there are milled recesses for each cell that retain them well enough that cells are retained laterally. I accidentally determined that the reverse-polarity indicator works as advertised once. The body of the flashlight is electrically neutral - due to the free-spinning contact insert in the tailcap (registered by prominent pins) it need not fully seat to make contact; this means that for longer-term storage you will need to remove the cells lest you end up with a completely dead light in a few months with no physical power switch to break the circuit. The tailcap O-ring seems a bit oversized - it tried to walk out on me once so I'm careful when screwing the tailcap back on.The manufacturer claims a constant-current circuit and I believe them based on the perceptible tint shift towards yellow in lower modes and the lack of strobing effects both moving the light rapidly across one's field of view and against highly reflective objects. Like most lights with relatively wide, deep reflectors, the MK41 throws quite well - from ~36" the primary hotspot is about 4" in diameter, falling off rapidly into primary spill about 17" in diameter then secondary spill in a ~120° cone. For routine usage - navigating on foot in darkness, task work - the tight concentration of output into a small area limits the utility of the flashlight; while Manker markets the MK41 as a thrower on their website, one wonders if a diffuser is available. With a flat bottom and a reasonable girth relative to its height, the light tailstands well on a flat surface and can light a room well via ceiling bounce.With its pleasant heft, the MK41 should be able to sustain turbo for longer than most single-cell "pocket rocket" lights before thermal limits kick in and it starts ramping down. But heat production is heat production and after less than a minute of turbo the head does get noticeably warm; after about two minutes it's unpleasantly hot. This is markedly better than my Astrolux S41 which starts to warm up in seconds on turbo.Glancing at the Cree XHP35 data sheet, one does have to wonder if 2000 lumens is possible out of the "HD" version. The top E4 flux group for the cool white 7000K thru 5000K bins top out at 706 lumens @ 350mA under lab conditions (25° C) and 635 lumens under more normal conditions (85° C); driving the LED at peak rated of current 1050mA should result in 240% rated output or 1694 ideal / 1524 real-world lumens. With the thermal safety built into the lights, some currents beyond 1050mA could be applied to get to 2000 lumens without cooking anything.Overall I'm satisfied with the purchase.

Light is very bright. Build quality is very good. I like the fact that i can use 4 AA batteries. I use 4 rechargeable batteries and lasts long as long as you don't have it at full brightness. All in all a good buy.

I really like this light. It's compact, very powerful and the more advanced programming is simple to understand. A real Home Run!

Very well made. Switch is a bit stiff but can be mastered with a little practice. It casts light much further than my old 4 D Cell BRINKMAN of 20 years ago. It is almost like a spotlight when using four AA batteries and even brighter with 14500 batteries.

This is the best flashlight I owned. Have not used it much, but I like the amount of light it produces.I also like the fact that it works with regular AA sized batteries.

This is a good light. My coworkers were waiting for it to come in. The grip on the light is very good. And the light color is white. The throw is awesome with sufficient side spill. I will be looking forward to buy more lights from manker.

I own 20 flashlights & this is 1 of best because if it's ability to run in AA easily obtainable & no problems if electricity outage prevents all my li on rechargeables from juicing up. The throw over 400m and the 1500lumens is simply a leader in it's class. Received immediately from great co. EDC.