battery shelf life

Prototype3a

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Sep 17, 2004
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Blacksburg, VA, USA
Ok I know Lithium Ion batteries (cr123) have an excellent shelf life but what about their rechargable cousins? I was thinking about getting a 2xcr123 powered light to keep in the car but I started to wonder about the life of pilas and possibly an innova T4 since I *hate* replacing batteries when there is a rechargable alternative.
 

SilverFox

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Bellingham WA
Hello Prototype3a,

I believe the self discharge rate for Li-Ion cells is around 1% per month. A little extra will drain off if the cell has a protection circuit, but it will not amount to much.

I just got a Skill screw gun that runs off of Li-Ion cells. They claim over 80% of capacity after 18 months. That sounds about right to me.

Tom
 

Prototype3a

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Sounds like it's dramatically better than that of NiMH cells. I've left some of those around for a couple months and they were almost dead. Now I just wish the T4 had a two stage switch /ubbthreads/images/graemlins/jpshakehead.gif
 

VidPro

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Apr 7, 2004
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Lost In Space
""I just got a Skill screw gun that runs off of Li-Ion cells. They claim over 80% of capacity after 18 months. That sounds about right to me.""

Gee that is better than the alkalines we get at the doller store /ubbthreads/images/graemlins/smile.gif, with that kinda of rate, if the flashlight does a Full disconnect (vrses a sleeping curcuit) i think i would be ok with putting them in the "emergency" lights in the autos.
 
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