Alkaline Battery Lights

wle · 2018-04-23T17:19:45.000Z

so far no one has mentioned another obvious choice - solar recharging. there are many options.
no need for alkaline, is the point.

wle · 2018-04-23T17:23:00.000Z

the CR123 primary cells do hold their charge a long time and as far as i know do not leak.

they also tend to hold more energy than same-size 16340 li-ion, though the voltage is lower.

and their capacity does not diminish much in cold weather

ideal for the car

and of course the lights that use them can be very small

wle

andrew124C41 · 2018-04-23T17:30:12.000Z

hIKARInoob:

andrew124C421:

Is there a consensus regarding lithium primaries vs enloops….if the light just sits in the glove box I would guess the former…

I think it should not matter. But beware of parasitic drain. There are plenty of lights that will completely drain the batteries after a couple of months or a year or so.

Are you talking about lights with some tail light that stays on or something else?

wle · 2018-04-23T17:36:05.000Z

some lights keep their microprocessor on, just to monitor the switch

better designs will ‘sleep’ the micro in a lower power mode, and pressing the button will cause it to wake up and start running the light, using more computing power

as far as specific lights, you would have to know about the design to really know where the drain might be, and the reason

older controllers may not have supported ‘sleep mode’, or the programmer didn;t bother to use it, or it could just be a circuit error, or as you said, any LEDs that stay on like in the button

wle

hIKARInoob · 2018-04-23T18:36:35.000Z

andrew124C421:

hIKARInoob:

andrew124C421:

Is there a consensus regarding lithium primaries vs enloops….if the light just sits in the glove box I would guess the former…

I think it should not matter. But beware of parasitic drain. There are plenty of lights that will completely drain the batteries after a couple of months or a year or so.

Are you talking about lights with some tail light that stays on or something else?

Lights with a side switch consume a tiny amount of power, even if the light is off. With an old school clicky switch, the electric circuit is open when light is off, so drain is zero.
But this is not the case with lights like the TN4A. One problem is that the parasitic drain value of a light is rarely specified by a manufacturer. Another problem is that the parasitic drain value can vary significantly from sample to sample, even though the light output is identical.
So basically the parasitic drain is one big unknown when purchasing a light. And this is a bad combination with a light that you want to leave in the glove compartment and forget.
An easy remedy with a light like the TN4A is to slightly unscrew the battery tube, so you have an open circuit for zero drain. But you must keep this in mind.

mmalive · 2018-04-23T18:53:58.000Z

I agree with all comments about ” Alkaleaks ” These type of batteries leak over time. Shelf life is minimal. If you value any of your flashlights do not use them. I will give you some examples below of my personal experiences of ” Alkaleaks ” I love all my flashlights whether high end or economy class.

1. My Police Security Silver 6 D flashlight leaked right from factory. Brand spanking new. I opened tail cap because it would no light up. Corrosive battery acid ate into wall lining inside damaging. Thank god only 3 of them leaked as I was able to remove them. BTW, this flashlight is extremely hard to find and not in production anymore.

2. Maglite 3 - 6 D flashlight. Same scenario as above.

3. Nitecore E41 4 AA same problem

4. Maglite XL50 3 AAA same problem.

As you can see Alkaleaks are very bad.

I will use them only in cheapo, or extremely low quality light. I pick up free battery packs from Harbor Freight for those purposes.

Use recharge ones : Energizer, Eenolops, Duracell, Lithium, etc….

Speed4goal · 2018-04-23T19:45:50.000Z

beam0:

andrew124C421:

“2/9 Fox Co (2009-2015) Semper Fi 0311/0331 Rifleman/Machine Gunner
Blf has changed a lot since I’ve been here. Lots of snow flakes and easily offended over nothing. When the forum use to be great and people joked around and could take a joke. It’s a forum it’s not that serious. Let’s make BLF great again!”

This is the world we live in where feelings dictate over facts. NYC has 31 pronouns for genders. While I no longer live in NYC, these laws can spring up everywhere. However, don’t expect me to ever use anything other than the indefinite pronoun ’he” in my professional writing. I stopped using he or she long ago. Interestingly, I have yet been called on in in my Quora posts.

Although I somewhat agree, I don’t understand where this is coming from here, how it pertains to this thread? Did I miss something? (Maybe someone deleted their post?)

It doesn’t pertain to the thread many blf threads get sidetracked. But it’s his thread to side track I guess. He just noticed my signature. I’m about to start a thread soon. Bringing all the snow flakiness to everyone’s attention in my 1000 post giveaway. It’s going to be a unconventional giveaway to say the least. I’m interested to see if the snow flakes will cry and ruin it for everyone. I’ll drop a hint it’s a light with a dedomed emitter that can’t be purchased anymore and people I’ve seen offer 5 to 10x the cost of the led. So it’ll be ashamed if people and their high estrogen ruin it. But it may not be the snow flakes fault completely. Soy is in every single processed food we eat. 99 percent. Soy significantly raises estrogen and lowers testosterone. Also the chemicals in plastic which is in everything we use in day to day life. Break down into estrogen into the body. So all these “men” in their feelings might not be all their fault completely. Or maybe I’m just a hard ass Marine that’s seen and done things people can’t imagine and words on a screen don’t bother me so much. Only person who can hurt me with words is my wife.

Phlogiston · 2018-04-23T19:45:09.000Z

If you’re worried about an emergency situation where you might have to make do with whatever cells you can find, I would suggest that you consider having two lights: one light that takes 3×AA or 4×AA, and a second light that takes 1×AA.

That way, if you only have one cell, you can still use the 1×AA light. If you have 3 or 4 cells, you can use the larger light for higher efficiency and access to higher light output (if you need it).

Efficiency is especially relevant with alkaline cells, because the boost driver in a 1×AA light trades current for voltage - it has to draw more current at the input to get more voltage at the output. That’s about the worst thing you can do with an alkaline cell, because its high internal resistance will cause its voltage to drop at higher current, so the driver needs even more current, which causes the cell voltage to drop still further, and so on into a vicious circle. NiMH cells and lithium cells are much less prone to this effect.

I would strongly recommend avoiding alkaline cells unless it really is an emergency, because of the risk that they will leak.

My advice is to put Eneloop NiMH in both lights, with an unopened pack of 1.5V Energizer Ultimate Lithium primary cells in a Ziploc bag stored next to each light. That way, the lights are ready for use, and you have a set of long shelf life cells ready as a backup.

Swap the Eneloops for a fresh set once a year, as a “belt and braces” precaution. They do hold a charge for up to 10 years, but there’s always an outside chance that even the best quality product might fail on you. It’s a fact of life that nothing’s perfect.

Steer clear of lights that take more than 4 AA cells, unless they can be used with a partial set. You might not be able to get your hands on 6 or 8 AAs at once in an emergency. For example, I have an old Fenix TK41, which is an 8×AA light, but I’m fine with that because it can run on 4×AA if necessary.

cu42 · 2018-04-23T19:45:35.000Z

Alkaline are yuk.
Lion and solar charger. win.
Make sure to get a light with lockout tailcap for 0 parasitic drain.

cu42 · 2018-04-23T19:47:23.000Z

Parametrek:

Right now I have 388 AA powered lights in my database. Here they are sorted by throw. There are a few that perform better than the TN4A but they all cost much more.

Impressive.
Thanks!

Speed4goal · 2018-04-23T19:49:38.000Z

hIKARInoob:

andrew124C421:

hIKARInoob:

andrew124C421:

Is there a consensus regarding lithium primaries vs enloops….if the light just sits in the glove box I would guess the former…

I think it should not matter. But beware of parasitic drain. There are plenty of lights that will completely drain the batteries after a couple of months or a year or so.

Are you talking about lights with some tail light that stays on or something else?

Lights with a side switch consume a tiny amount of power, even if the light is off. With an old school clicky switch, the electric circuit is open when light is off, so drain is zero.
But this is not the case with lights like the TN4A. One problem is that the parasitic drain value of a light is rarely specified by a manufacturer. Another problem is that the parasitic drain value can vary significantly from sample to sample, even though the light output is identical.
So basically the parasitic drain is one big unknown when purchasing a light. And this is a bad combination with a light that you want to leave in the glove compartment and forget.
An easy remedy with a light like the TN4A is to slightly unscrew the battery tube, so you have an open circuit for zero drain. But you must keep this in mind.

Yes my tn4a has bad drain in it. I’ll put batteries in it. Come back maybe 5 6 weeks give or take and it’s on the red. It will still run for awhile but I can’t get into turbo. So now I leave it backed off half a turn or so. Now my nitecore ea41 can sit for twice as long without having low barriers. But as you said it can vary sample to sample. I don’t lock it out physically or electrical it can do both. I can’t remember if the tn4a has a switch lockout

beam0 · 2018-04-23T21:17:27.000Z

Speed4goal:

It doesn’t pertain to the thread many blf threads get sidetracked. But it’s his thread to side track I guess. He just noticed my signature.

“pertains” was maybe the wrong word but I couldn’t think of the right word, I didn’t mean sidetracking/derailment whatever, I was curious what he was replying about here, thought it was odd for that to just come “out of the blue” but I never noticed your sig so that explains it, thanks.

Henk4U2 · 2018-04-23T21:18:22.000Z

andrew124C421:

Is there a consensus regarding lithium primaries vs enloops….if the light just sits in the glove box I would guess the former…

Works for me. In my car I have, besides a thrower in the arm-rest, a Nitecore MT22A with Eneloop Pro’s in my glove box, and an EagleTac D25C-ti with a CR123A in my Bug-out-Bag. Plus some spare batteries, and a charger, of course. Don’t leave home without it :smiling_imp:

Parametrek · 2018-04-23T21:40:38.000Z

andrew124C421:

That is quite a database you have there. Is it possible to put in multiple parameters or only one?

Thanks. You can filter by any number or combination of fields.

Lightbringer · 2018-04-23T22:56:48.000Z

raccoon city:

I wouldn’t put alkaleaks in anything that I valued.

This.

Doesn’t matter if you use a “name brand” like Enerleakers or Duraleak, they WILL leak. Great way to absolutely positively ruin a light, as I’ve done, unfortunately, several times. Even my TK4A now has a brown “nipple” inside where the alkaleak took a dump all over it. Goodbye beautiful little EA01, when a lousy AAA exploded inside it.

You won’t have to worry about zombies when your alkaleaks will put you in the dark.

Use alkaleaks only as a last last last resort, and toss them as soon as they hint at being near end-of-life.

Now, the lights… Yeah, a nice Thorfire TK4A / Sofirn SF11 are veryveryvery similar, right down to the UI. They take 4×AA in series, and will put out around 1000 lemons on high, rivaling even 18650 lights.

They use e-switches, do not physically lock out, so only load ’em up if/when you’re going to be using them. Else you’ll forget about it in a car or closet, and goodbye light, when those hateful little batteries gleefully destroy your light’s innards.

Lightbringer · 2018-04-23T22:48:30.000Z

WalkIntoTheLight:

Stick with Eneloops. They’ll vastly out-perform alkaleaks, and will stay charged for 10 years in storage. If your wife insists on using alkaleaks, head straight to a lawyer specializing in family law. (Grab your flashlights on the way out.)

Naw. You just give her the alkaleaks, you keep the eneloops, then when the SHTF, grab your lights and just toss her to the zombies.

WalkIntoTheLight · 2018-04-23T23:38:16.000Z

Speed4goal:

Yes my tn4a has bad drain in it. I’ll put batteries in it. Come back maybe 5 6 weeks give or take and it’s on the red. It will still run for awhile but I can’t get into turbo. So now I leave it backed off half a turn or so. Now my nitecore ea41 can sit for twice as long without having low barriers. But as you said it can vary sample to sample. I don’t lock it out physically or electrical it can do both. I can’t remember if the tn4a has a switch lockout

Generally, the more expensive the light, the lower the parasitic drain will be for its electronic switch. But the parasitic drain can vary widely. I have measured some of my lights with as little as 2 microamps of drain, and others with over 1 milliamp.

Most Zebralights are among the lowest drain, and you can essentially ignore the drain completely. It’s lower than the self-discharge of batteries, and would take over 20 years to drain a battery.

Some of my cheaper lights have a parasitic drain that depletes them in just 2 months. This makes them essentially useless for storage with batteries in them.

If you’re storing a light for long periods of time for emergencies, then get one with a mechanical tail switch. That way, it will have zero drain.

Speed4goal · 2018-04-24T00:40:50.000Z

I don’t use my aa lights much and I have a pile of eneloop pro, Amazon pro, imedion, and Duracell lsd. I try to use them a little more now. But sometimes I’ll leave the tn4a screwed on so it will drain the batteries. So I can rotate in another set. So they don’t sit for a year and not be used. If I know I’m taking my kids to the park or something soon I’ll back it off a half turn. But with so many lithium lights. Much smaller lighter and more powerful I have to make myself use them. But I keep them just incase. I was ground zero for Katrina (literally the east eye wall hit Bay St. Louis). Lithium batteries would have been impossible to use or charge. But aa batteries I could have easily scavenged. All I had was what I could throw into a single dufflebag

Pete7874 · 2018-04-24T00:50:52.000Z

Another 4xAA / 4x14500 option: Manker MK41.

Pete7874 · 2018-04-24T00:52:50.000Z

WalkIntoTheLight:

If you’re storing a light for long periods of time for emergencies, then get one with a mechanical tail switch. That way, it will have zero drain.

Or just loosen the tail cap, although I know it’s easy to forget.