Why use L91/L92 lithium primaries?

28 posts / 0 new
Last post
dhvl1357
Offline
Last seen: 9 months 2 weeks ago
Joined: 05/18/2016 - 05:59
Posts: 302
Location: South India
Why use L91/L92 lithium primaries?

Realised I bought myself quite a few 1xAAA torches lately, far more than what I could use in daily rotation, and thought of storing them around the house with L92 batteries in them. When checking for prices, I realised they cost almost as much as Eneloops. So for all practical purposes w.r.t. self discharge, doesn’t it make sense to buy the Eneloops and top up their charge every few years (or even 5 years) than throwing out those L92s? Or am I missing something?

Slow is smooth; smooth is fast.

Chicken Drumstick
Offline
Last seen: 1 month 1 day ago
Joined: 08/27/2012 - 05:00
Posts: 2762
Location: UK

Yes, no, maybe….

Wink

There is no correct answer here, just preference.

The Lithium primaries will give ultimately longer runtimes than NiMh does. And the long shelf life means they can serve easily as backup lights for long periods of inactivity, or even random short use.

Eneloops are good, but even the best LSD ones still loose charge over time. So it really depends if you think you will be proactive enough to check them and top them up when needed. Or if you have enough torches, to simply not worry if one is flat.

EyeballFryer
Offline
Last seen: 1 year 6 months ago
Joined: 11/30/2015 - 02:17
Posts: 416
Location: California, USA

According to this Energizer .pdf about lithium primary batteries, on the “Shelf Life” page, they claim that at room temperature, the lithium primary batteries is supposed to retain 95% of their original capacity. The advantage of this over Eneloop is that if you forget to recharge the Eneloops after several years, they’ll be low on power.

Also, so far, I haven’t found any info about whether or not Eneloops can still be recharged to 95% of their capacity after 20 years. In other words, how much does age itself affect Eneloop’s performance?

I buy lithium primaries for their ability to survive more extreme temperatures. I have a couple packs of AA and AAAs in my car in case the Eneloops in my car flashlights are discharged when I absolutely need them to work in an unexpected auto emergency.

ReManG
Offline
Last seen: 6 days 4 hours ago
Joined: 04/25/2015 - 22:52
Posts: 2668
Location: Between the Mexico's

Keep an eye out for the L92’s on sale. I stocked up on several packs of energizer AAA/AA lithium’s at $4 a four pack at home depot recently.

The alternate is the Sunbeam brand alkaline batteries at Dollar Tree stores. At $1 a pack of four, just spend fifty cents a light per year and change them twice a year.

dhvl1357
Offline
Last seen: 9 months 2 weeks ago
Joined: 05/18/2016 - 05:59
Posts: 302
Location: South India

Got it. I guess for my use, I’ll stick to eneloops for now and keep an eye out for L92 deals.

Alkaline is out of the question. While I personally haven’t had any leaks, have heard too many leakage stories to risk them in my babies. Big Smile

Slow is smooth; smooth is fast.

brad
brad's picture
Offline
Last seen: 1 month 2 weeks ago
Joined: 12/04/2012 - 02:07
Posts: 2380
Location: USA

I would use the Eneloops, the 4th generation still holds 70% charge at 10 years and can be recharged 2100 times, and I am not the type of prepper to leave them without attention for 10 years at a stretch anyway, and many battery chargers plug into the cigarette lighter of the car, they also operate down to -4f temps.

I prefer owning such a high quality, almost permanent reusable battery, to one time use of what amounts to a super quality Alkaline that is still a throwaway, having some lithium for specialized needs is nice, but I would still use the Eneloops as the foundation of my long term preparation needs.

Eneloops can even be partly charged with your solar garden lights in an emergency or taken to any government supplied recharging station, or friend/neighbor’s source of power for recharging during emergencies, or as mentioned, charged in your car, with Eneloops you have much more depth, flexibility, and long term battery security.

ImA4Wheelr
Offline
Last seen: 1 month 15 hours ago
Joined: 02/03/2013 - 14:51
Posts: 7933
Location: SC

My preference is Eneloops. I have a bunch of rechargble AA and AAA’s. None are kept in lights in drawers to be forgotten. The cells not loaded in lights and such, to be used, sit in a stack of fully charged cells. Once a cell get drained, it thrown into a box awaiting recharge. Once enough drained cells are in the box, I charge them and put them on the bottom of the stack of fully charged cells. That way all my cells are in rotation. I keep unload lights in one location too.

If power interruption event is approaching (hurricane, big snow storm, etc). I load the fully charged cells into lights and such and then scatter them about the house, cars, etc.

EDIT: Fixed some typos

Beachlogger
Offline
Last seen: 3 hours 37 min ago
Joined: 12/04/2013 - 23:08
Posts: 992
Location: S.E. Alaska

If I remember right they work better in the cold which is why I have them in my light for the glove box, cold might not be an issue for you or I could be not remembering write, lol

dhvl1357
Offline
Last seen: 9 months 2 weeks ago
Joined: 05/18/2016 - 05:59
Posts: 302
Location: South India

Exactly, Brad and ImA4Wheelr. Good to know lots of other folk share my feeling that L91/L92 batteries are a little outdated.

Slow is smooth; smooth is fast.

dhvl1357
Offline
Last seen: 9 months 2 weeks ago
Joined: 05/18/2016 - 05:59
Posts: 302
Location: South India

Am not sure how much of a difference extreme cold makes, but I’m more likely to have my lights and batteries on me rather than in the glovebox, so quite the nonissue in my case.

Slow is smooth; smooth is fast.

SIGShooter
SIGShooter's picture
Offline
Last seen: 1 hour 11 min ago
Joined: 07/14/2013 - 02:10
Posts: 2138
Location: northern california

I keep primaries in all my cars and also in my earthquake supplies. Not so much for me but more for my wife and kids. I have several solar chargers but there’s no assurances that I’ll survive the event and it’s easier for them to not have to think about charging batteries. I could certainly rotate rechargeable batteries but sometimes it’s hard when a car is away for years at a time.

msim
Offline
Last seen: 3 years 7 months ago
Joined: 11/05/2014 - 14:29
Posts: 61
Location: Seattle

I just gifted my mom a couple AAA keychain lights with L92 cells inside. I figure the extra runtime and longevity of the cell can only help.

hank
hank's picture
Offline
Last seen: 2 days 14 hours ago
Joined: 09/04/2011 - 21:52
Posts: 9564
Location: Berkeley, California
Quote:
I keep primaries in all my cars and also in my earthquake supplies. Not so much for me but more for my wife and kids. I have several solar chargers but there’s no assurances that I’ll survive the event and it’s easier for them to not have to think about charging batteries. I could certainly rotate rechargeable batteries but sometimes it’s hard when a car is away for years at a time.

Me, same.

Wise for any area susceptible to the occasional earthquake/hurricane/tornado/swarm’o‘locusts, I’d think.

Once the dust starts to clear and the fires are out and the sun comes up, there’ll be time to set up recharging stations for the neighbors.

But for that first few hours — I’ll be glad to be handing out flashlights with Energizer lithium primaries.

Heck, during the first few hours of dusty, shaky and dark, people will drain cells dead and throw them away without looking at them. And that’s fine.

And if it’s daytime — you’ll be glad if you remember having studied this, before you needed to know it:

http://sb.longnow.org/SB_homepage/Earthquake_Lessons.html

Quote:
some advice that might be useful to anyone wishing to survive a disaster and to help others to do the same. The article is dedicated to Janet Ray, who did not survive October 17.
texas shooter
Offline
Last seen: 2 hours 15 min ago
Joined: 08/26/2012 - 02:14
Posts: 1507
Location: Texas

I still use L91/92’s in devices that might sit a few years without use. I use Eneloops’ also but for items that get a bit more use. I am budget but not on batteries.

Firelight2
Firelight2's picture
Offline
Last seen: 1 hour 40 min ago
Joined: 04/08/2011 - 15:17
Posts: 4204
Location: California

Lithium primaries are MUCH ligher weight than Eneloops. The difference is definitely noticeable in the pocket. If weight is an issue, such as for a small EDC, the energizer lithiums work great. Why carry around extra weight when you don’t have to?

Speed4goal
Offline
Last seen: 5 months 3 days ago
Joined: 06/11/2016 - 13:03
Posts: 1204
Location: Bay, St. Louis Mississippi

I use eneloop pro clones, Duracell, amazon pro, imedion etc. But I also keep a stash of about 400 alkaline cells 200 aa 200aaa and best buy has clearance sales every few months on there energizer advanced lithium for like 3.99 a 4 pack or something. And on amazon every two months I have them send me a pack of 8 aa ultimate lithium’s. Just want to he prepared. I have 10 years to use the alkalines and I will in time with two daughters. But I live in the heart of hurricane alley. Power can be out for up to two weeks. Can always charge batteries in the car. But usually using the car to run power inverters for fans and keep the refrigerator going every couple hours. Car batteries have amazed me. Long as you start it up every few hours for about 20 mins you’d be surprised what you can run off it. I’ve ran a swimming pool pump for a 16 ft round pool for about 12 hours without starting. Crabked right up. But back to subject. Don’t wanna get caught unprepared. Need my lights and lanterns to work. Aa and lithium lights. Along with gadgets to keep my oldest daughter entertained. All three chemistries would get heavily used.
And might be soon. That storm out by Cuba is predicted to come right in the mouth of the Mississippi just like Katrina did. Well Katrina was 30 miles closer to me. If this storm does this and develops I’ll be homeless again. Like I was after Katrina. But that’s s whole different story

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!

brad
brad's picture
Offline
Last seen: 1 month 2 weeks ago
Joined: 12/04/2012 - 02:07
Posts: 2380
Location: USA

I would like to learn more about that using of the car battery to cycle the refrigerator periodically, that has been my plan for years but I keep waiting for the money for a quality inverter.

A solar car battery charger could help keep your car battery healthy during those uses.

Do you think this inverter would be enough for a modern top freezer fridge?

https://www.amazon.com/dp/B007Y4BL1C/ref=wl_it_dp_o_pd_nS_ttl?_encoding=...

Garageboy
Offline
Last seen: 1 week 2 days ago
Joined: 09/15/2020 - 09:11
Posts: 12
Location: Brooklyn, NY

They’re good for your average person who’s not going to remember to charge their batteries. I threw some in a lantern and a cheap low output single mode 2aa energizer light for my mom in case of emergencies

Lightbringer
Lightbringer's picture
Offline
Last seen: 2 hours 26 min ago
Joined: 08/30/2016 - 14:12
Posts: 14049
Location: nyc

And for a buk each, getting CR123As is a good choice, too.

Can run in 1-cell lights (Jet-II, i332, KL03, etc.) or 2 at a time in 18650 lights that can stand up to 6V (most Nitecores and a bunch of Sofirns).

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

Henk4U2
Henk4U2's picture
Offline
Last seen: 7 hours 31 min ago
Joined: 02/13/2014 - 17:52
Posts: 3925
Location: The heart of the Netherlands (GMT+1)
Garageboy wrote:
They’re good for your average person who’s not going to remember to charge their batteries. I threw some in a lantern and a cheap low output single mode 2aa energizer light for my mom in case of emergencies

You’ll notice the number of emergencies rises with age, like to reading small print in the evening.
So I have a lot of AAA lights scattered around the house. Most of them with L92 primaries.
For the moments I want just some light, any light, at THAT particular moment.

The batteries in my 18650 lights are never “suddenly empty” so it’s LiIon for those.
They are just too bulky to stash everywhere. I’ll take them if I know I’ll be needing a light (for a walk).

You are a flashaholic if you are forced to come out of the closet, to make room for more flashlights.

jon_slider
jon_slider's picture
Online
Last seen: 11 min 29 sec ago
Joined: 09/08/2015 - 12:20
Posts: 4238
Location: The Land of Enchantment

> Why use L91/L92 lithium primaries?

There is no reason for me to use disposable Lithium Primaries.

I use Eneloops, because I like saving $$$

example:
today on ebay I can buy:
4x L92 for $8 = $2 each

I save $2 every time I recharge an Eneloop.

slmjim
slmjim's picture
Offline
Last seen: 3 hours 15 sec ago
Joined: 02/04/2018 - 17:49
Posts: 393
Location: Derby City - Home of The Louisville Slugger

I have a camera that absolutely refuses to play nice with NiMh 1.2v cells for more than 10 shots.  Lithium primaries are a reasonable & safer alternative to alkaleaks.  Once the camera rejects them, they can be used in other AA lights for a long time.

  Lately, I've been running 1.5v Tenavolt rechargeable LiIon cells in it with very good results.  Tried them based on info gleaned mostly here on BLF.  Too soon to establish time/shots before need to be recharged, but results so far are very promising.

 

slmjim

Great... Carnac the Magnificent tells me I just signed up for yet another expensive hobby.

Smile! It makes others wonder what you've been up to.

flydiver
Offline
Last seen: 50 min 54 sec ago
Joined: 06/19/2013 - 19:16
Posts: 1225
Location: Seattle, WA

Tenavolt should work OK for devices demanding the 1.5v. They don’t work well if there is a constant requirement for > 2.0A, like lots of flash use. They do OK up to 1.5A.
Good battery after almost 2 years of use for me. Going for the long term test.

To Air is Human, to Respire….Divine.

Hoosh
Hoosh's picture
Offline
Last seen: 3 hours 32 min ago
Joined: 08/17/2015 - 21:15
Posts: 110

jon_slider wrote:

I use Eneloops, because I like saving $$$

example:
today on ebay I can buy:
4x L92 for $8 = $2 each

I save $2 every time I recharge an Eneloop.

Facepalm

No, you don’t. No matter “how little,” what do you suppose is the cost in electricity for your recharge? Each, and every time, even? If your going to be priggish, at least be factually priggish.

JagerLion
Offline
Last seen: 7 hours 7 min ago
Joined: 11/08/2020 - 21:56
Posts: 24
Location: USA
Hoosh wrote:
No, you don’t. No matter “how little,” what do you suppose is the cost in electricity for your recharge? Each, and every time, even? If your going to be priggish, at least be factually priggish.

Charging an AA Eneloop costs, what, one penny? Even long term the cost of the charger probably affects the equation more.

Unloco
Offline
Last seen: 6 hours 40 min ago
Joined: 01/27/2018 - 16:17
Posts: 478

In some situations we don’t have access to a source of electricity to make a charge… so we have no choice but to turn to the primaries.

zoulas
zoulas's picture
Offline
Last seen: 2 hours 37 min ago
Joined: 06/01/2020 - 08:35
Posts: 826

Energizer Lithium are the best non rechargeable AAA and AA batteries. Great for thermostats. They last for 3 years straight.

Tumbleweed48
Offline
Last seen: 14 hours 29 min ago
Joined: 11/12/2012 - 23:21
Posts: 808
Location: Canada

I use Eneloops as well, for more mundane things like portable radios, cameras and wall clocks – but for EDC use like my flashlights, I really appreciate the light weight and long life of my Energizer Ultimates. I’ve had too many of my favourite things ruined by alkies to ever use another one. (I do keep a few around in case of ‘borrowers’ – they get a plastic 2AA with alkies that I write off the moment it leaves my hands.)

If you watch for sales and bulk-buy prices, the added expense of the Energizer Ultimates is not that big of a sacrifice. Skip a single restaurant lunch, and you’ll have the price of a couple of years worth of lithium primaries.