^Gurthang
Flashlight Enthusiast
Salvaged from a Lenovo pack, 4 cells, each measures 49 mm X 32 mm X 10 mm, about the size of a Zippo lighter. DMM reads 1.5 V each. Rechargables but not Li-Ion. NiMH??
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Help me ID these odd batteries
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VidPro
Flashlight Enthusiast
"prismatic" ni-mh?
that wouldnt make sence, levnovo is a laptop tablet maker?
my first guess would be they are ruined canned rectangular li-ions
picutures, more info?
what does the cathode looke like, the connection other than that battery case .
is the battery case Positive "ground" or negative?
that wouldnt make sence, levnovo is a laptop tablet maker?
my first guess would be they are ruined canned rectangular li-ions
picutures, more info?
what does the cathode looke like, the connection other than that battery case .
is the battery case Positive "ground" or negative?
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Illum
Flashaholic
heh, this reminds me of rechargeable battery packs made nearly twenty years ago...and those were lead acid
Mine was from mom's AIWA valkmann cassette player, LxWxH (2-11/16" x 11/16" x 5/16") 2V 550mah
At 2V each, if they were to measure 1.5V they would be essentially dead.
If they were NiMH and measured 1.5V then they are at full capacity, If NiCd then slightly overcharged.
If they are LiCoO2 then they are considered pretty much dead, It can't be LiMNO2 or LiFeS2 because its a rechargeable, and probably not LiFePO4 because those batteries haven't been widely implemented in laptops...yet.
If no pics is available can you at least tell us the relative date your Lenovo was produced?
Mine was from mom's AIWA valkmann cassette player, LxWxH (2-11/16" x 11/16" x 5/16") 2V 550mah
At 2V each, if they were to measure 1.5V they would be essentially dead.
If they were NiMH and measured 1.5V then they are at full capacity, If NiCd then slightly overcharged.
If they are LiCoO2 then they are considered pretty much dead, It can't be LiMNO2 or LiFeS2 because its a rechargeable, and probably not LiFePO4 because those batteries haven't been widely implemented in laptops...yet.
If no pics is available can you at least tell us the relative date your Lenovo was produced?
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^Gurthang
Flashlight Enthusiast
Here are pics of the battery in question:
The battery pack was from a Lenovo ThinkPad from 2005.
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The battery pack was from a Lenovo ThinkPad from 2005.
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Illum
Flashaholic
holy cow!
no clue:candle:
no clue:candle:
VidPro
Flashlight Enthusiast
90% sure that is a li-ion, what to do with the other 10% ? charge it SAFELY at about 500ma to 3.6v and see if it blows up 
because the voltage was very low, if it was low for LONG, then it is complete toast, and Dangerous to charge, if it was low for only a few hours, then it is just junk, and risky to charge.
because the voltage was very low, if it was low for LONG, then it is complete toast, and Dangerous to charge, if it was low for only a few hours, then it is just junk, and risky to charge.
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^Gurthang
Flashlight Enthusiast
Thanks for the help, folks. I'll agree w/ VidPro that it's some sort of Li-Ion. The pack was in its orig. packaging, never used, never charged. I think it was rated 14.4V 1750mAH. Its the form factor that puzzled me. I've done several Google searches and come up empty as to the actual battery cell used. I doubt the Lenovo sourced a custom cell design. Anyway, they do have enough juice left in them that I'll try to cobble up some sort of half-assed light using an old Nite-Ize emitter. Maybe a "Zippo-LED", that would be unusual.
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