I have a question about performance vs battery used. Does this light preform better with 2x cr123's than with 1x 18650 due to higher voltage?
1029266
This flashlight puts out near UVA light, at about 400 nm. Humans can see down to 385 nm. Bright Sunlight has more radiation at this wavelength than this flashlight so our eyes get exposed to this level of near UV light for hours at a time if you don't wear sunglasses. UVA is hardly filtered by the ozone layer so almost all UVA reaches us and this flashlight produces light at the very edge of UVA and visible light.People fear UV but it is the deep UV that harms you. Turn the light on and put it on your arm. Do you get sunburn that is caused by UV? No way. Put your arm under a DEEP UV light and it will cause redness. Just use a regular pair of sunglasses if you want but it is unnecessary. This flashlight puts out near UVA light, at about 400 nm. Humans can see down to 385 nm. Bright Sunlight has more radiation at this wavelength than this flashlight so our eyes get exposed to this level of near UV light for hours at a time if you don't wear sunglasses. UVA is hardly filtered by the ozone layer so almost all UVA reaches us and this flashlight produces light at the very edge of UVA and visible light.People fear UV but it is the deep UV that harms you. Turn the light on and put it on your arm. Do you get sunburn that is caused by UV? No way. Put your arm... » Read More This flashlight puts out near UVA light, at about 400 nm. Humans can see down to 385 nm. Bright Sunlight has more radiation at this wavelength than this flashlight so our eyes get exposed to this level of near UV light for hours at a time if you don't wear sunglasses. UVA is hardly filtered by the ozone layer so almost all UVA reaches us and this flashlight produces light at the very edge of UVA and visible light.People fear UV but it is the deep UV that harms you. Turn the light on and put it on your arm. Do you get sunburn that is caused by UV? No way. Put your arm under a DEEP UV light and it will cause redness. Just use a regular pair of sunglasses if you want but it is unnecessary. « Show Less
1029267
I was unaware that any of these UV LED modules were rated for more than 4.2 volts, until I read the specs on subject unit. I own several UV LED modules that appear identical in construction; purchased at different times, from different sellers. All are unmarked for voltage range. My unfortunate experiences have been that applying significantly higher than rated voltage will damage or burn out LED modules in short order. My amperage draw (thus, draw wattage draw being computed) tests with several such UV units using a fully charged (4.2 V) 18650 battery show that they typically draw (V x A = W) between 1.72 Watts and 2.98 Watts. Tests with other LED modules that are marked for a voltage range (like 3.0 to 9.0 or 18.0 Volts) always have shown that higher input voltages typically result in an increased Watt draw, using the previously cited formula, and brightness output. Even at a 1.75 Watt draw these modules produce a UV radiation output that is several times greater than that other commonly available types of LED UV pocket flashlights. Yellow UV blocking eye-wear (available on Amazon from about $5.00) should be used with them to minimize the risk of eye burns from reflected radiation!
1428445
This flashlight takes the CR123. It DOESN'T fit an 18650. And the reflector is smooth, it's NOT and orange peel reflector. I have this flashlight so I can see all this in person. Lol. It's a great lil flashlight though.
1262192
If you use AAAs and use it often thru out the day ( Contractor and a mechanic) you will use them up. It will SUCK them up!! I have 6 of the 18650 an this is the best battery ive ever had the light output is comparable to a large mag light an goes thru half a battery a month if you get this light buy a 18650 battery an charger combo 12 bucks extra an the difference will blow your mind. or you could waste that same cash on aaa an think you got a bum light. we use this light daily for a couple months good light also have a 501b an a couple 502b's awesome lights
734060
This light should always be used with protected 18650's, I use the protected Panasonic 3400 Mah cells from international outdoor and couldn't be happier.
1596771
There is a performance gain by using the 18650 battery. I tried both battery options and found the 18650 to work the best. I have a couple other flashlights that uses the 18650's. I purchased a 12pk of the 6000mAh batteries and that is my recommendation. That last for ever. I hope this helps.
400615
I have the older model only with 3x AAA battery, However they do not last long, can I use the single 18650 battery in my model?
880858
I own 2 of these lights. It's 3 instead of 2. You want to use the extension and use 3 batteries because this flashlight uses a lot of power. Try to buy your 18650 batteries in multiples of 3... such as a dozen.
912828
I'm kind of having the same issue. The new batteries I have put in, die fast. I have been using regular store bought batteries. I know there are higher power batteries sold at places like Batteries Plus, that are specifically designed for high lumen flashlights. Might be worth looking into if you want to have optimum performance from your flashlight. I recently ordered a Zebralight SC52. Waiting on it now, but also ordered a $10 high powered AA battery to use in it. It was a battery they sell, and recommend. If you still don't have good light after trying these batteries, I would send it back, or try an exchange, because these Nebo Redlines are pretty cool. Good Luck. Hope I helped in some way. LOL I'm kind of having the same issue. The new batteries I have put in, die fast. I have been using regular store bought batteries. I know there are higher power batteries sold at places like Batteries Plus, that are specifically designed for high lumen flashlights. Might be worth looking into if you want to have optimum performance from your flashlight. I recently ordered a Zebralight SC52. Waiting on it now, but also ordered a $10 high powered AA battery to use in it. It was a battery they sell, and recommend. If you still don't have good light after trying these batteries, I would send it... » Read More I'm kind of having the same issue. The new batteries I have put in, die fast. I have been using regular store bought batteries. I know there are higher power batteries sold at places like Batteries Plus, that are specifically designed for high lumen flashlights. Might be worth looking into if you want to have optimum performance from your flashlight. I recently ordered a Zebralight SC52. Waiting on it now, but also ordered a $10 high powered AA battery to use in it. It was a battery they sell, and recommend. If you still don't have good light after trying these batteries, I would send it back, or try an exchange, because these Nebo Redlines are pretty cool. Good Luck. Hope I helped in some way. LOL « Show Less
1429958
These are 3.6vdc. Under a load, it should drop to around 3v depending on the load. If your flashlight required 2 cr123 batteries then, your flashlight required 7.2vdc however, with that said, if your light had a xenon bulb, then it suffered from a short 6 month max life and, probably had little to do with the batteries.
825288
It uses a cr2 battery not a cr123. But if you are looking for a good mini flashlight for me the best is the four seven cr2.
1956860
Not sure about the the C rating on these Ultrafires. I've got two sets that I use in two Klarus XT10 LED flashlights putting out 800 Lumens - I get about 1.5 to 2.0 hours on high from each battery. The bottom line: if you're using a similar flashlight for patrol where you need the light for up to several hours during a shift - consider a more expensive battery. For utility or homeowner use I recommend the UltraFires and will buy them again. I have had very good luck over the past two years with them.
1027149
cr123's drain quick. You get more output generally, but less shelf life. I found this out the hard way with a pistol mounted laser. With cr123s, put them in, check they work and don't turn it on unless you need it. Your millage may vary though.
734064
Personally, I wouldn't. I could be wrong, but most of the better quality 18650's are protected, and on a light this nice, I just would not consider using less than a great battery. Not sure if that answers your question.
461356
Patrick the best battery that I have found to use is the Orbtronic 18650 3100mAh all others I have tried have failed after a couple recharges, I have recharged these batteries 14 times and they still charge up to 4.2 V and maintain brightness down to about 2.7 v. I use the light everyday and I swap batteries about once a week. Hope this helps
1155747
It comes with two 18650 3000 mah batteries. If you order 18650 (5000 mah) batteries they last longer. I have 10-12 of these flashlights and have never had any problem.
1933882
Mine came with the single longer battery and unique charger. tried putting in 2 of the 18650's and they wont power. not very happy about that as the the stock battery only says 2200mah and the 18650's i got are like 3500mah each. Everything else seems good about the light. Been out on 1 dive and did a good rinse after.
28025
my flashlight uses cr123 it works fine with the batteries I use. but as I stated my batteries are NOT re-charged.