Battery ignorance….

Buff

Enlightened
Joined
Dec 21, 2023
Messages
382
Location
North Carolina Mountains
Ok i have not ever been a rechargeable battery guy. So i bought several lights. Some came with batteries and i bought a spare. Then i bought more spares. I literally have a few to many spares. I store them in the thick ziplock plastic bag they came in. They all came at about 75% charged. Had no idea if the go below 2.5 there could be a problem? A fire hazard?? What to do? Do i fully charge them and then every 30-60 days repeat.
As i said i am totally ignorant to what to do and don't want to burn my house down.
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This is my storage arrangement.
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I did read a lengthy thread on batteries but an old one (2010) and a bit too technical. Just need storage idea as in fully charged then recharging on a schedule.
 

KITROBASKIN

Flashlight Enthusiast
Joined
Mar 28, 2013
Messages
5,447
Location
New Mexico, USA
Do not fully charge and let sit indefinitely.
Don't let batteries go down to nothing or low voltage disconnect and let them sit for long.
If considered backup, charge batteries to 3.8V-4V and enjoy life.
If long term storage, keep below 3.8V above 3.6V and enjoy life.
Check them semi annually (solstice or equinox?) and feel good about your due diligence.

Others will have some differences with this.

Batteries you want to be lower voltage, put them in a fun flashlight and maybe take them to the river walk in Morganton some lovely evening?
 

Monocrom

Flashaholic
Joined
Aug 27, 2006
Messages
20,138
Location
NYC
That's actually a good storage arrangement if one has tons of batteries. For anyone unaware "HART" is an in-house Wal-Mart brand mostly known for power-tools. (Most of which are very inexpensive but not very powerful at all.) As for the questions....

Not a fire hazard stored that way. But make sure the cells aren't touching each other end-to-end. As far as they stand still, and aren't used; they should be fine but check a few times a year. If a cell hasn't been used in quite awhile. Be sure to charge it up first before putting it in a light.
 

Buff

Enlightened
Joined
Dec 21, 2023
Messages
382
Location
North Carolina Mountains
checking all my batteries now. I have two lights with Anduril 2 that has the test mode. All 18650 and 21700's were 3.6-4.2 so all is well there and I've had some for 4-6 months.
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My smaller batteries are all showing 75% which is how they usually come with the lights.
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Not sure what to do with this 4 pk still in the wrapping I purchased a month a go?
 
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