Older Energizer L91 - still good? - pic

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Moddoo

Moddoo

Flashlight Enthusiast
Joined
Nov 19, 2008
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Minnesota
Hey guys
I found an old L91 in a box of stuff.
I am unsure of the actual age, but I am pretty sure that I picked these up when they first hit the shelves.

Anyway, I just thought I would share.
check this out

P3220065.jpg
 
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Re: Energizer L91 - shelf life confirmation - pic

...is there more information? Curious to hear the rest...
 
Re: Energizer L91 - shelf life confirmation - pic

not really much more to say.
I would guess these are 6 or more years old, and still over 95% charge.
I tried to find the year the L91 was released, but no luck.
 
Re: Energizer L91 - shelf life confirmation - pic

Is that open circuit voltage or under load voltage?

Didn't the early L91s have a 10 year shelf life? If so, that would make that a cell from 2003.
 
Re: Energizer L91 - shelf life confirmation - pic

Black Rose said:
Is that open circuit voltage or under load voltage?

Didn't the early L91s have a 10 year shelf life? If so, that would make that a cell from 2003.
Click to expand...

Open circuit.
recommend a simple load and I'll be glad to test it again.

You may be correct on the age, I am not sure.

I just thought it was interesting. I expected it to be a used dead cell.
Happy to find it still looking good.
 
Re: Energizer L91 - shelf life confirmation - pic

I believe when they first came out they had a 10yr date code, so that one would be from 2003. Later they improved the chemistry and changed the date code to 15 yrs. I think at some point they may have also changed the chemistry to give a slightly lower open circuit voltage.

Open circuit voltage is a poor indicator of capacity. I have one here that has been used a fair bit with a date code of 2011 and an OCV of 1.79v

Note: the old chemistry became the EA91, also known as the yellow stripe "energizer Advanced lithium"
 
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Re: Energizer L91 - shelf life confirmation - pic

The AA cell was first introduced in 1992, but I don't remember them that far back. I've been using them for the past 7-8 years and those were a 10 year shelf life. They changed to a 15 year shelf life from 'proprietary improvements' about 4-5 years ago.

The shelf life is guaranteed to certain specs (stored at 21°C). The lithium cells are guaranteed to be at 90% at the end of 15 years and alkalines are 80% at 7 years.
 
Re: Energizer L91 - shelf life confirmation - pic

cave dave said:
I believe when they first came out they had a 10yr date code, so that one would be from 2003. Later they improved the chemistry and changed the date code to 15 yrs. I think at some point they may have also changed the chemistry to give a slightly lower open circuit voltage.

Open circuit voltage is a poor indicator of capacity. I have one here that has been used a fair bit with a date code of 2011 and an OCV of 1.79v

Note: the old chemistry became the EA91, also known as the yellow stripe "energizer Advanced lithium"
Click to expand...

nice bit of info.
I don't have a "battery tester" with load.
I may rig something up though.

the cell does say L91 on the side. But I understand they changed the name later.
I wondered about the "new" "energizer Advanced lithium"
 
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well actually its pretty much toast :sssh: according to what i read, and have seen.
a new one of these things reads Neer 1.8V like More than 1.76v usually (which is not to say always) and after reading a bunch of stuff , anything with less than 1.7v should be suspect as not being a viable candidate for extensive capacity :-)
its not an alakline, wherein a nice readout like this would mean it was new and healthy and fresh and ready to go, its a battery that can read like that UNDER a load, after its half gone.

its Dead Jim :tired: or it at least needs to be woken back up. mabey its still in stasis, but i doubt it, it's an energyser and they didn't go into stasis.
 
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I have a set of old ones but they're gold and red.They say photo on them.Mine says best if used before 2009 so I guess that means 1999 was the year they were made.
DON

BTW The old ones flash amp test at about 3.35 A same as a new one.
 
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