Pretty Darn Good For 11 Year Old NiMh Batteries!

I've had these 4 Panasonic NiMh batteries since Christmas 2002. They have been used 98% of the time in our digital cameras. Lately they seem to not hold a charge very long, but after 11 years I can't complain! They are not high capacity and are not LSD cells. In the photos below I did not do a capacity test, I simply charged them and checked the display for how much mAh was put in them. They were likely discharged and left that way for a few weeks (they were recently found in my brother-in-laws camera case).

Good ol' Panasonics!

-Garry

I have a few of those cells too, think they were from costco. They were pretty good when I used them but over time they could not hold a charge for very long.

I have some 30+ year old nicads in some test equipment battery packs that are still going strong…

i have those in my tv remote!! they lasted 6 years before having to be recharged lol.

you really need to do a discharge test to determine capacity, if the batteries are burning most of the energy as heat you won’t know it from these numbers

I love those Panasonics, I have even older 1600mAH ones from BJ's still going strong.

What I have noticed about old NiMh cells that when they get old, they still charge up pretty well but the self discharge rate increases. I have some older ones that self discharge in about a week.

I have some old sanyos which got a really high resistance, if I discharge them at 1A they immediately go down to below 1V.
They are still usable in some things but I will probably toss them someday…

I did do a discharge test on 2 of them a little while ago when I started noticing they weren't holding a charge very long. I believe they came out around 1800mAh. I'll replace them for camera duty with some of the Duraloops that dchomak sold me.

-Garry

I've had some Powerex that went bad, you could charge them fine but in 1 week they were at 0.9V, so discharged.

i have energizer and duracells that do the same, basically everything i have thats not eneloop has not as well

I have some sanyo 1200's about 20 years old.

everything I've bought since that isn't a sanyo is dead .