COSOOS 2 LED Headlamps Flashlights with Portable Cases, 1.6oz Mini Bright Running Headlamp, Waterproof Head Lamps, Small Headlights for Adults, Kids, Camping, Hiking, Night Reading (NO AA Battery)

Nice lightweight headlamp. Head band adjusts and can fit my large noggin. Three brightness levels. One click is medium brightness, second click is maximum brightness. If you hold the orange button continuously then the side lights come on instead of the center bulb. That setting is best for reading a book, a more diffuse light.I just received this headlamp and incorrectly believed that the light was dim. It wasn't the light but I had a defective rechargeable battery, came back and changed my review. Light output is great for indoors during a blackout. I have no idea how well it would work camping or jogging.There are no instructions in the box. You will not know how to safely open the battery compartment. Here is how you do it. Click the headlamps head down and you can now see the back of the headlamp. You will be able to now see a gap under the latch. I used a Swiss Army screwdriver and popped it open. You can probably use a coin or any small object. Longer fingernails might bend under the pressure of prying open the latch.Get this headlamp that only needs a single AA and get another headlamp that uses AAA. That way when a hurricane/blackout/etc occurs you will have options to scavenge for batteries around your house, if need be.I bought this AAA headlamp too and I'm ready for bad weather and blackouts. Once you use a headlamp you can't go back to using handheld flashlights.https://www.amazon.com/Headlamp-Lighting-Lightweight-Headlight-Batteries/dp/B005FEGYJC?ref_=bl_dp_s_web_3033804011(EDIT) Dec 2019 COSOOS headlamp has been working perfectly since I bought it and I even bought a second backup COSOOS headlamp. No problems whatsoever with either of my headlamps, I'm very pleased.I was wondering how long the COSOOS headlamp would last with the "two side lights" (reading lights) powered on before draining the battery.I decided to test how long the "two side lights" would last. I don't use alkaline batteries. I use rechargeable batteries for my devices. I didn't want to test using my Eneloops because that is a really good battery. So I decided to use my AA Nuon 2500 mAh 1.2V battery.CAVEAT - A fully charged 1.5V alkaline battery would last longer than my 1.2V battery.I charged my rechargeable Nuon AA 1.2V battery and made sure it was 100% fully charged. I put the headlamp in the bathroom with the "two side lights" on, aimed headlamp at the ceiling, left it alone. Grabbed my phone and used a stopwatch app, checking on the headlamp about every hour or so.After 6 hours and 10 minutes the headlamp was still burning but I could tell it was quite a bit dimmer. I put on the headlamp and could easily read the print on various items in the bathroom. I came back to check on it at 6 hours and 35 minutes. Uh oh, the bathroom was totally dark. I'm not sure the precise time the light went off. The 1.2V battery lasted somewhere between 6:10 and 6:35. I'm going to assume that it lasted 6:11. Pretend it lasted 6 hours. That means that you could get 24 hours of reading and usable light around the house with four 1.2V batteries. I do wonder how well alkaline batteries would last compared to rechargeable batteries.I've heard that using a flashlight in the freezing cold will increase the battery drain. The temperature in the bathroom was about 68 (68 Fahrenheit, 20 Celsius). If you are out in the freezing cold your battery life could be compromised. But many people say that only applies to alkaline batteries. But some people say that it also effects rechargeable batteries. Food for thought.For hurricanes, blizzards, blackouts, dog walking, jogging, etc. I would be very happy with my headlamp because I have access to plenty of spare batteries. But if I was camping or someplace that I couldn't get my hands on a new battery, I would avoid this headlamp and pay more to get a headlamp with better battery life.I don't own a Petzl headlamp or even used one before. But the Petzl brand seems to have a very long battery life. If I was hiking in the woods at night or exploring caves or an abandoned building or Dracula's castle, then I'd want a headlamp that could go for hours and hours and hours. lol (You could just carry spare batteries in your pocket)The COSOOS is a five star headlamp that cost 8 bucks. The Tikka Petzl cost 29 bucks. Two things that that I wish the COSOOS had would be a low lumen reading light setting and a red light. As long as you have multiple batteries the COSOOS is a fantastic headlamp. I can remove the drained battery and switch in a fresh battery in my COSOOS with my eyes closed in the dark. I have another type of headlamp that uses three AAA batteries it's easy to switch out the AAA batteries, that is if you have the lights on. The only nitpick I really have with my COSOOS is it doesn't have a 5-8 lumen reading setting.I've turned of all the lights and made sandwiches, washed dishes and walked around the house with no problems. COSOOS is a very lightweight headlamp and you forget you are wearing it. If the electricity suddenly goes out then you are going to want a headlamp or two. Keep all your batteries in the same kitchen drawer so you can find them when you need them in a hurry.I used to be a flashlight guy but I much prefer a headlamp. A heavy metal flashlight might be in order if you are going to take a small yapping dog on neighborhood walks and she challenges every dog behind every fence. In that case a headlamp isn't going to be of any use. You are going to need an aluminum MagLite flashlight (club) and hope that Cujo doesn't dig under the fence and try to eat your yapping dog. Small dogs think they are lions.PETZL TIKKASUPPOSEDLY 60 hours of battery life on high.SUPPOSEDLY 240 hours of battery life on low. I believe that low is the reading light setting. https://www.amazon.com/dp/B01KYTU6BO/?coliid=I1HEDQ93OQR0NIPETZL - Tikka Headlamp, 200 Lumens, Standard Lightingby PETZL

Lights bright as you would need it to be, it’s built well, it fits good, it’s easy to use, and it didn’t cost much. Very satisfied!

Not sure on the battery life. So far, so good after a couple months of infrequent use. The cases are a nice touch. Good value for the money.

Updated review October 2020. I cannot say enough good about this light. I had a chance to use it during the prolonged power outage from Hurricane Zeta. It performed flawlessly. It is light weight due to the single battery and with the 2 led flood light it was a perfect level of lighting for doing household tasks like washing dishes by hand without power. A single battery on the floodlight setting lasted about 4 hours (so 2 evening uses). The spotlight on high was about equal to a 2 AA cell minimag LED (not the Pro or Pro+) in terms of throw and pattern. High was actually too bright to use inside. A great power out buy! Get this and an 12 pack of AA and you should be set for several days of power outages.Yes I get that headlights are not fashionable but in this case function trumps form.*****Original review *****This is exactly as advertised. It uses a single AA battery. It has 3 modes hi/lo spot type beam and 2 side floodlight type beams.First the brightness of the spot beams. It is turned on low when you first press the button on the top so if you want it brightest mode press twice. On high it is not as bright as a Luxpro LP100 (~ 100 lumens) but it is still a very good throw distance and illumination area flashlight. It is quite usable on high and on the low setting. The wide flood light setting is useful for short forward distances while walking around.You cannot turn on both modes at once so you have to pick one.It is very light weight and even more so with a lithium battery. The run time is about 1 hour on high. Obviously the limited run time is due to the fact that there is only one AA battery and not a design flaw.The quality is good for the price. It appears to have decent gaskets for water proofing for casual dampness. All in all a decent $7 flashlight.

Fantastic bargain. I have purchased several headlamps over the years and this one is the best thus far — exceeding the performance and value of some $30 headlamps. I have another headlamp that I paid too much for but never used because it eats batteries in 3 hours while off due to a short circuit somewhere — corrosion everywhere, what a mess. This one just works and works (and I use it in a marine environment). I don’t know if the metal contact strip inside is stainless steel or not, but it hasn’t flash rusted as so many devices like this do with so much salt in the air — absolutely no flickering or failures at all. I attribute this to intelligent materials choices and engineering: One AA battery (I use rechargeables), wide, comfortable headband; easy-to-use, ratcheting angle adjustment; straightforward off-low-high mode control; quality plastics; ergonomic footprint where it rests on the forehead; lightweight yet quality construction; large, rubberized power switch that is water resistant (if not waterproof — haven’t subjected it to harsh downpours without being protected by rain jacket hood brim). This product derives its low cost from its minimalist, form-follows-function engineering — thoughtfully designed pieces that go together well with an emphasis on the fewest parts and simplest mechanisms as necessary. Afterthought: It does not have red light or blinking options — just low and high beams. I prefer the simplicity to having 5 or 6 modes to toggle through. I use it for working on things and the beam pattern is excellent for that. Could use a red lamp for night ops on the boat, but I have another lamp and built in lighting for that. I use it exclusively on low and the battery lasts for hours. Just bought another.

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It uses only one AA battery and will last you a day , cheaper to operate than most other that take three AAA battery at much higher cost.

The ONLY headlamp I could find that uses ONLY one AA battery and it's the perfect headlamp! Quality. Comes with a small travel case, good brightness, you can move up/down the light, comfortable headband.

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