What batteries for infrequently-used emergency flashlights?

Inazone

Self-Determination or Death
Brass Subscriber
#1
A couple years back, as I was setting up an LBV for "bump in the night" investigation, I decided to include a Maglite that my brother had given me as a Christmas gift a year or two prior. I forget the exact model, but it was a smallish one with a clip on it, all the better for vest attachment via webbing. It came with either a Duracell or Energizer battery, so it was really ready to go as far as I was concerned. Well, a few months later as I was doing a periodic gear check, I went to turn on the light, and it was dead. Opening it up revealed the telltale residue of leaked battery acid. The light was a total loss.

These days, I have an assortment of lights, as well as a couple of scopes with illuminated reticles, requiring a variety of battery sizes. I've always had decent luck with Rayovac as far as leaks (none) and life (average, nothing spectacular) but I'm not sure how long they'd last if used infrequently, both in terms of holding charge and leaking. I'm generally a cheapskate, but I'd be somewhat less than pleased if a light or scope failed, either due to a prematurely dead battery or an acid leak.

That's my long, drawn-out way of asking for suggestions.
 

Back40

Well-known member
#2
I have a few lights that I use frequently, and they get whatever batteries I've stockpiled. Usually Duracell from Costco.

The lights I don't frequently use, don't have batteries. That's the only way I've found to avoid the problem you've experienced.
 

240Geezer

Old dude with a ‘tude
Gold Subscriber
#3
You always run the risk of having a battery go bad like that. You can leave the battery out but still clipped, taped, banded to it. Or put a piece of plastic under the tail cap and leave it in.
Either way you would have to mess with it.

I’ve seen all brands do the leaky thing. Then again I have a 4 D cell Maglite with the same batteries in it for 10 years. Every six months I find it and turn it on. So who knows.
 

HandLoad

May GOD BLESS AMERICA!
#4
Lithiums are lighter, have more stored energy, and don't leak the corrosive goo as soon or as often as Alkalines. They last in waiting/standby mode, Years longer.

My personal rule is, use the light, even for a short time, replsce the battery! Same with all my expensive Radios! One battery, (worth One Dollar? ) Craps in a radio, I am out $250.00 - $400.00 !!!!
 

HandLoad

May GOD BLESS AMERICA!
#6
Be aware, however, that as Batteries gain energy density, they become less benign! I have personally witnessed a 9Volt Lithium in service as a backup battery for a Carbon Monoxide Monitor/Alarm, short after some Years on duty, EXPLODE with enough force to propel the whole unit out of the wall socket, blast off the rear cover and land more than a foot into the Hallway, smoking pretty amazingly!
 

The Branch Manager

Winter is coming. Forever.
#7
I rarely buy anything but lithium any more. 123 and 18650 rechargeable and even further o light charging has really reduced my battery bill. Nothing stored has a battery in it. I do have a couple "outpost" lights in my junk museum that rarely get used. I keep lithium in these. I do use a lot of vaseline on my threads and seals, also a little dielectric grease on the battery connectors. Because they're not "cheap" lights.
 

WhiteWolf

Wolf Mage
Silver Subscriber
#9
I've been having good luck with the Amazon Basic rechargables. I use 'em in the driveway alarm, so they take the heat of summer (can be over 100 in direct sun) and below zero temps and keep on working. Seems like I might only swap them twice a year, max. But that thing does get a lot of use.

Because I've been doing this prep thing awhile, figuring out a way to store batteries for devices along with the devices but not IN them, got to be an issue. If you search amazon for Battery Storage - you'll find all sizes to safely store 4-6 depending on size right along with your radio, light, whatever. Each battery is held securely in it's own clip, so the terminal don't touch cause problems, like in ziplocks.

Like:

https://www.amazon.com/Storacell-Po...GPJR9H8PMARZN64J7YAA&qid=1568552133&s=gateway

In addition, there are all kinds of boxes in that category.
 

The Branch Manager

Winter is coming. Forever.
#11
If we're going old school, I bought a box of carbide Miner's lights. I don't know how bright they're going to be but they're there if we need them. I had originally bought them as driveway markers because I didn't want to do a full-blown system of gas lights and then I found the little single individual propane model gas lights that were $40 a piece so it negated the whole project
 

GOBLIN X

PUKUTSI
Brass Subscriber
#12
all my long term stuff gets laded mt with the batts in a double plastic bag affixed to the light( I hate to clean out corroded lights (and i dont wanna ruin my NV) sight /red dot batts get change 1 time a year whether they need it or not.(and thats why i getting ready to make a move to Trijicon reflex /ARMSON OEG MAX sights. no dang batteries) its always going to be the one you miss changing that ruins the device. had it happen too many times. even had watch batteries separate and ruin a vernier caliper. best advice is go batteryless where you can.
 

The Branch Manager

Winter is coming. Forever.
#14
Yep, figured they might be useful someday for something. He who dies with the most junk wins, right? They're just cheap Chinese Ebay models. I just went to go grab a link and it doesn't seem like they've got them on there anymore. I'm certain they'll be back after the tariffs. They were 16 bucks a piece if I remember correctly. I paid more for the calcium carbide than I did for 10 of the Lamps
 

240Geezer

Old dude with a ‘tude
Gold Subscriber
#18
That’s a blessing and a curse.
When you have so much crap you can’t find what your looking for you just say screw it.
Better to go buy that box of screws than burn an hour of daylight looking for it.