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    21700 headlight

    I was repowering an old headlight with a new 18650 battery and got curious about whether there were any 21700 lights available. I did a search and found this one.
    https://www.illumn.com/flashlights/a...-included.html
    With a 5100mAh battery run time at 350 and 750 lumens is huge. 15h, and 6h. A nice lens and wide beam pattern. I don't own this (Too many Niterider lights already).
    https://www.acebeam.com/bk10
    They're calling the strobe setting an SOS. No idea what you'll get there.

    #2
    Lights have been ridiculously overrated by most all players to try to out sell each other. You have to find reviews that compare a bunch against each other. I got a vastfire twin light twin 18650 unit that has 5200aH. Its labeled as 1000 lumens for 4 hours, and has lo-mid-high-strobe-SOS. So I would bet that Acebeam cant do any better. Amp hours is amp hours and they all put out similar light. The difference is how they decide to focus it and the actual quality of the batteries they use. My light cost a quarter of what Acebeam is advertised at and it does hold up for nearly 4 hours. But in time it will slowly have less battery capacity.

    On second thought, I may not have been using it at max power. Its really bright at max power and I may have been running it at a lower power. I just turned it on at max and will see how long it lasts. Its been months since I last charged it though.

    Been running at max for 4 1/2 hours now. And its several years old. And it was last charged in January. And its not even off green on the power meter. I used reviews to pick this out like I pick all stuff out. Because the ads on stuff are always embelished in some way. LED light most especially. So the Acebeem may be a good light. But not at $120. At that price its a waste of cash. Not a total waste but a 75% waste. And I got other things Id rather buy with cash not wasted on an Acebeam. Im using reviews right now to pick out a worthwhile allarm. Already used reviews to pick out a spring seat, cheap, after finding out there are no spring saddle posts for my 24.4mm bike tube. Still looking thru reviews to get a suitable bike lock. They all seem to have problems stopping thieves. So its a hard decition left for another day. As My Vastfire light continues to burn brightly.

    Yea its finally dropping off. Still very bright but the power meter is loosing it. So its going to be done soon.

    Its done at 5hours and 50 minutes. Not at all hateful. And its blindingly bright and the beam is spread out wide for great view. Im sure I run it lower so this think will never actually run out on me. And its good for many runs without having to recharge. Its waterproof, and its shirt pocket sized since its 2 batteries side by side. And its still $29.99 on Amazon. Thats about what I paid for it and it also comes with a tiny rear blinker light. I use it like a flashlight from time to time, but I have a bunch of flashlights laying around. Very blinding to be flashed with though. Thats what I hate about LED lights.

    Well it seems they upgraded my light from when I bought it. On Amazon its now 6000Mah, The light is now 1200lumens, and the color is lowered from 6500k to 5000k. 6500 really is hard on my eyes. Thats probably why I go to lower power. But it runs at 6 hours at 1000 lumens. So mine is holding up very well with age. But then again I dont use it very much. But it reviewed very well in its price range. I really like 5000k light way better. Cars with that bluish light at 6500k wears my night driving out on vacation trips.
    Last edited by stts; 09-03-2022, 08:25 PM.

    Comment


    • Retrorockit
      Retrorockit commented
      Editing a comment
      I own a few dual 18650 lights. They work well and are Niterider brand so pretty much a known quantity. But the batteries are not user replaceable. This light you just pop in a new 21700. It's probably the coming thing. But not mainstream yet. I didn't see much else out there, so not much comparison available yet.
      I'm not saying this is a particularly good light.It may or may not be. I'm just pointing out that 21700 lights are becoming an option, and if run time is important to you probably worth a look.Acebeam does do 1060 lumens, and claims 2000 in Turbo.But I ignore the highest settings. I don't fing them as useful as the middle ones.

    #3
    Well here's another where retro and I are likely opposites lol

    I don't think I'd like the size of a 21700 light... I've gone the other way and using an 18350 (not 18650) light that easily fits in my pocket... it can also utilize 123 (primary or secondary) as a backup... Plenty bright or dim (5 levels from 1 lumen all the way to ~1000 lumens) - I usually only run 1 lumen to better keep eyes dark adapted and to avoid drawing attention or annoying others

    Only use I have for strobe is when I *want* to annoy someone - not often - usually just for the idiots that run strobes on the multi-use where they are entirely unnecessary and super annoying...

    Comment


    • Retrorockit
      Retrorockit commented
      Editing a comment
      Strobe penetrate the tinted windows on SUVs.. Strobes also light up crosswalks across busy high ways at night. Fast ones make it look like your bike is going fast. Those are the most annoying ones on the bike path. I keep them and put new batteries in them. I usually don't let my bike out of my sight. I do own the smaller lights for backup. But with a 24Ah battery run time is more of an issue than it used to be. I have one light with a replaceable 18650. I was looking at removing the battery holder and putting a 21700 in there. But it would n't work.My thinking on 21700 lights is they would be smaller than
      2x 18650 which is what i'm trending towards at the moment.
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