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Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Drivers, Test-load, Power Supply, & Batteries



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Old 12-17-2012, 05:26 PM #1
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Smile Batteries found in old laptop

Are these batteries any good?



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Old 12-17-2012, 10:34 PM #2
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Default Re: Batteries found in old laptop

richard86;

Those Panasonic cells are from 2007 . . .

so they may be close to end of their life.

Check the Internal Resistance as outlined in the stick thread at the top of this grouping.

Keep any that are under 120 milliohms under a ~1 amp load.

They were probably about 1800mah when new.

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Old 12-17-2012, 10:47 PM #3
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Default Re: Batteries found in old laptop

Thanks mate. As there old il prob end up throwing them

Cheers for the reply.
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Old 12-18-2012, 12:43 AM #4
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Default Re: Batteries found in old laptop

Probably not that good anymore indeed. Perhaps good to keep around as spares, but they will have nothing near their rated capacity by now, especially if the laptop they were in was operated for a few years.
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