should I throw away an old, unopened package of batteries?

[CTyankee]

I understand they lose strength over time. Just toss 'em?

[claudette]

1. There's usually

an expiration date on the package. If expired safely take them to a place that recycles batteries and not just trash them. IMHO

[sl8]

2. Shelf life depends mainly on the type.

Last edited Sun Jun 1, 2025, 07:57 AM - Edit history (2)

Shelf life varies, based on multiple factors, but primarily the chemistry.:

Alkaline : about 5-7 years
Lithium (non-rechargeable): about 10-15 years
Zinc-carbon: about 2-3 years
Silver oxide: about 3-5 years

https://batteriesinc.net/shelf-life-of-various-battery-types/

On edit:

As Claudette mentioned above, dispose of them properly. In some places, disposal of some types of batteries in regular trash is against the law.

EPA recommendations:

https://www.epa.gov/recycle/used-household-batteries

Used Household Batteries

[Lochloosa]

3. Home Depot and Lowes both have a recycling bin for batteries.

Just drop them in the bin.

[bucolic_frolic]

4. Why not open them and see if they worK?

I run on Nimh rechargeables but for longevity they require you get the charging time correct. AAA 900mah @5.25 hours. AA 3000mah @17.5 hours. That larger size and higher capacity really add to the recharge time. AI calculated those times.

I also recharge batteries that are not rechargeable. I have some AAA's in a flashlight that goes dim. I recharge it for 30 minutes. Lasts for months.

[Raven123]

5. Interesting. Hadn't heard of that.

Dumb question. Do you use a rechargeable battery charger?

[bucolic_frolic]

6. Yes, it's an old one.

And I think when AI calculated I had to give the strength of the charger.

And charging non-rechargeable batteries has some risks. Charged too long and they can leak acid. I've had no problems with the 30 minutes so far.

[Raven123]

7. Thanks

[LogDog75]

8. I'd use a battery tester to determine if they're still good.

A simple battery tester for AAA, AA, 9-volt, and D-cell batteries like the one below for about $10.

?v=1733966568

[CTyankee]

9. wow, thanks!

I could keep that at my little home office desk. That is cool.