Its a fairly commonly used lithium rechargable battery used in led flashlights, laptop battery packs, and many other uses.
Scroll down to round lithium ion rechargeable.
I’m surprised you have never heard of them, they are fairly commonly used.
And the lithium AAA’s are not rechargeable (aaa/aa size lithium iron disulfide, or LiFES2 batteries). Which are really quite expensive compared to rechargeable lithium ION cells, lithium polymer cells, and all the other chemical soup lithium rechargeable batteries they have been coming out with in the last decade or so.
Worst comes to worst, i’ll just buy an appropriate sized lipo pack, and put a low voltage disconnect chip on it to protect the cells from overdischarge.
18650’s are a lot more convenient though, as they are usually the ones that fit in 3aaa flashlights without any mods needed.
I bought 6 of these during a woot off week before last. I work as maintenance and sold 4 of them in one day for $12 each to coworkers. Everyone is impressed with the brightness and so far I’m impressed with battery life.
Bought these last time. Neither one worked properly right out of the box. Without going into details, I contacted Woot customer service about this over a week ago and still have not heard back. I’ve halted woot purchases until this is resolved.
The 18650 would be too long. I just measured mine received last week. The housing inner diameter is 22mm and the battery holder is 54mm long, shorter than the 65.2mm length of the 18650. The 18500 might work being 49.8mm in length, but it would be loose in the housing and I’m not sure if the contact spring would take up the necessary 4mm in length.
Just chiming in to say I also bought these on Woot and the brightness IS impressive. I use these every few days while working in the garage, back yard, and on the car and have yet to experience any battery issues. Overall, I’d say this is a VERY solid value.
Probably could just add some kind of spacer/washer in the housing to make up the 4mm difference.
As long as the contacts aren’t some weird design like the rosewill led flashlight i got that took 3aaa’s in a battery holder/caddy, it should be able to take some kind of lithium cell.
Knowing the inner dimensions really helps as far as what lithium cells i need to buy. Thanks again
What about voltage when using lithium batteries, ie an 18500, or smaller cells with spacers?
I would assume a fully charged set of 3 aaa nimh’s would give you about what a fully charged lithium would in terms of voltage.
Under load it would seem like you would get the same voltage as well, assuming 1.2v nimh’s, and a 3.7v lithium battery.
My question is, does the flashlight have a voltage regulation chip, or does it just go with the voltage it gets, and limits the current?
It matters because you would get a brighter light with 3x new lithium primary cells, or alkalines, versus nimh’s or lithium rechargable cells when fully charged.
But the load voltage drop charachteristics between those four battery chemistries is really what matters i would think. If the lithium’s don’t drop as much, then i would assume it would give a brighter light, even if the other battery types had a higher charge voltage.
Since they would have a bigger voltage drop when the light is in use, assuming lithium ion rechargable cells have a lower voltage load drop, or certain type of high drain lithium cells do.
The hour is late for asking questions, but maybe someone is out there ??? helloooo?
I bought a couple of the Lenser T7 and P7 flashlights and I am so happy with them. Wanted more for holiday gifts. I missed the one offered on sellout. : (
How do these compare? The others also came in such a nice little case to strap on your belt or bag or what not.
Are these giftable for camping friends ? Or not so much… I should look around for the other.
What say you ? helloooo?? anybody ?