When it comes to flashlights your looking at: Light Output, Battery Life, Durability, and Special Features. And with that in mind this is a pretty good flashlight for the price. I would buy it again, and here's why.1. Output. It's pretty bright, serval times brighter than my 3v Mag Light. It's hard to say what it's really putting out because all of these people lie about the Lumin's. Not a swinging one of them ever actually measures it. But it's on the high end.2. Battery Life. This part is kind of my specialty, because Lithium is a field that stays intentionally confusing. So most people don't know how to compare it to say AA batteries. And even AA's are tricky little buggers. So heres a break down.In rough numbers, measured in milli amp hours or mah. Using non-rechargeable A cells, because rechargeables have about half the juice. And that's pretty weak.Lithium=990-3500 (2200)AA=400-1500 (900)AAA=400-1000 (750)What that mean is that that given the same bulb you need roughly 3 A type cells to match 1 single Lithium. And given that a lithium recharges more times than a standard rechargeable A cell. It would still win out over anything short of a whole pile of A cells.3. Durability. I give it 4.5 / 5 here. It is for the most part fantastic. largely made of metal, well sealed and it's a simple functional design. It's all contained in a single compact unit. I don't like that some of the reflector housing is plastic. And the battery cap is thinner than I like. But to be fair it's all metal and it should be more than strong enough. I haven't had it long enough to really work the tilt mechanism. But it looks simple and reliable. The only weak spot is the head bead. But that's not uncommon. Its and elastic band, eventually it's going to lose its stretch. But its on par with anything else on the market.4. Special Features. It has 2 light settings, and it has a charger built in. That may not sound like a lot, but they are well made. The light levels are intuitive and functional. And unlike the standard A cell system, this can be plugged in and charged with the battery still in it. That means few wear cycles. It's a simple device that does what it does well. There aren't a huge cluster of LED's like in a lot of head lamps. Because no matter how many bulbs you and you have the same working amperage. And with the current state of LED's more then 2 will mean dimmer LED's. With more and more wasted power for every additional LED. Even when there not turned on every extra LED cost power that could be used for light. And don't even get me started on the independently swiveling lamps.So all in all, the output is about as good as it can be without more batteries. And it's more the reasonable durable. That makes it a good flashlight.

First Misleading Reviews - unfortunately well intentioned reviewers misinterpret technical spec documents and make mistakes that tear apart good products like this one. This is in response to Kimberly's Review of the specs included with the SLONIK S25 model 1,000 Lumen, dual LED Headlamp, and the product itself & the packaging, accessories , etc.. First I can understand and even empathize with her frustration as to why more electronics aren't made in USA and the relatively lower cost of products made in Asia, some of those products/companies are not reliable & I too have found incorrect or exaggerated specs. BUT in this case - I found SLONIK to be Extremely reliable, customer service oriented, products r very well made, excellent craftsmanship, name brand parts & reliable operation - their instructions are EXCELLENT, clear & concise including warranty information, specs & contact info. Top 10% IMHO as compared to similar electronics I purchased on Amazon in past 10 years. That said - the "False Advertising Claim" you made re: the pair of CREE X-Lamp model XP-G2 LEDs (Proudly stated, BTW, that the LEDs are Made in America!! - SLONIK's primary selling point!).. The Flux output you refer too on Cree's website (pages 6-14) is clearly stated as the "Minimum Luminous Flux @ 85 C & (more importantly!!) @ 350 mA". - If you go to page 17, you'll find a Table - "Relative Flux vs Current" (@ 85 C) for both the Standard and High Efficacy versions of this same LED - the Standard version can handle up to 1500 mAh batteries, the Hi-Efficacy up to 2000 mAh. At 350 mAh - we see it intersects @ 100% - just like you said - if battery was a 3.7V @ 350mAh then Flux (lumens) would be 100% x 164 lm = 164 lumens per LED x 2= 328 lm output from both LEDs. BUT we have a 2200mAh battery - look at the graph - @ 1000mAh it is 250% x164 = 410 each LED (820 lm total) @ 1500 mAh (max for standard Cree XPG-2) = 340% x 164 = 557 lm x 2 LEDs = 1114 lm Total - MORE than Spec claims and well within 2200mah/3.7V battery rating - spec claims that at this level (assuming it is the 100% mode) - you'll get 4 hours before recharge (battery dissipates 8.14 watts/hour, or max of 2.2 hours running full load, @ 1500mah/3.7V load - battery will dissipate 5.55 Watts/hr. My quick math in my head says we should get around 3.5 hours of battery at 100% brightness setting, spec says "4 hours" at 100% running at 10 watts (each LED is rated at max 5V/1A or 5 Watts x 2 = 10 Watts). Anyway - according to Slonik's spec and Cree's Data Sheet for the LED & battery capacity chart (assuming all is perfect - NEVER IS) the Lumens STATED in SLONIK's Spec = 1000 lm for 2 x CREE XPG-2 Standard Version is CORRECT as math and Specs say output @ 1500mah = 1114 lm - Close enough - Color Temp - Depends which model CREE they used - I would guess in Daylight/Cool White range where LED has higher Flux in that 4200-8000 Kelvin range rather than warm white below 4000 Kelvin range.In closing - after about 6 weeks using this light almost everyday with my head and light stuck in 9.5" ceiling holes cut for 4 new Dolby Atmos speakers and new 6" smart Recessed lights (x 8). The storage case, instructions and battery are IMO high end for any price-range, charge cable and integrated mini-USB port - is flimsy - not because SLONIK is bad - that mini USB is awful in general it is unreliable and should be discontinued on any equipment (cell phones included) - it's garbage and a bad idea - if u r careful with it it's fine - get a higher quality cable - I have a spare external 18650 floor charger - I use it for my LED flashlights - BTW flat top battery that SLONIK uses has no connection troubles in my external charge (no electrical contact issues because of small positive nipple on the battery - nipple is fine just like it is). I typically set headlamp on lowest or 2nd lowest setting for my purposes - electronics repair, construction projects, outdoor dark night activities - sneaking around at night & BBQ-ing in the dark. Have not found a practical use for "Full Power" Yet - but man is it bright - and the combo "Spot" & "Flood" HQ lenses are excellent. Charges fully in less than 90 minutes - my only minor complaint is it does get warm if u wear it directly on exposed skin - like my skull/forehead - need to turn it off between "jobs".Band is very soft & comfortable, easy to adjust.In summary, the negative review re: Lumen Output was a simple MISUNDERSTANDING of how CREE's LED Flux output is calculated - & I think some folks paid lots of $$$$ for other "BRANDS" that are same as this & R looking for a "Flaw" in this product that just isn't there.

I went for this one because of the huge battery and decent price. I also like the metal housing and nifty storage case. The rubber lamp holder works without issue.I rely on my headlamp as a mechanic in a commercial environment, and this light gets the job done as long as you charge it daily.The brightness is very good, with I believe 8 intensity levels. I use level 4, hoping for a good balance of runtime and brightness.I used this on a 3 night camping trip in backcountry, and I found that it was perfectly adequate for the job, still showing green or near full after the trip.This is the second one of these I've bought in the last 4 years. Overall this is a great lamp with great value.

Ran this light during night shift on a mine site. Never ran out of power, super bright, super good. Expensive but worth it.

Item is very easy to use. It is very bright. The band is easily adjustable, yet stays tight. The light does not slide. Love the brightness this light provides. I've had several other headlamps, but this one eclipses them all. I would highly recommend this light.

Muy buen material, iluminación muy buena y la duración de la batería es buena!!

Super-lightweight and super-bright battery hold charge for serval hours and maintains brightness - quick recharge and simple connection to usb. Really like the lightweight when running throughout the night for ultramarathons