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    How Do Most Lithium Ion Batteries Behave When They Are Approaching End Of Life?

    most of the cells that I EDC .. currently li14430 or CR2 size, all 10+ years old what I've noticed is .. as cells age charger when set to 1C tend to draw way more than 1C amount of amps and/or milliamps. for instance .. charger set to 1C results in cell being charged hard enough to heat up...
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    How Do Most Lithium Ion Batteries Behave When They Are Approaching End Of Life?

    I was part of the original group of CPF'ers that were amongst the world's first use of lithium ion cells in flashlights. lots of explosions back then starting out when very little was known about then emerging technologies for individual use of li-ion cells. have been using those same batch of...
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    Battery storage limitation

    in terms of safety LiFePO4 is completely all the different flavors of Lithium cobalt and/or other trace elements. LiFePO4 also has less energy potential for same size battery and much higher number of charge cycles. in terms of sheer numbers 12v LiFePO4 motorcycle batteries has probably the...
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    Battery storage limitation

    this is a topic where only the passage of time tells the tale. the greatest majority of Lithium cobalt cells from my modest stash, some from 2003 era are still in great condition and holding 3.8v range. vs CR123 cells from that era are mostly dead. recently pulled out a box of CR123 cells only...
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    LiFePO4 abuse tolerance & overall safety.

    you probably already know this but Silverfox is one of the most knowledgeable battery guys anywhere. he also was one of the original core members when we on CPF first started experimenting with li-ion cells. we all were guinea pigs back when li-ion use in flashlights was just getting started...
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    LiFePO4 abuse tolerance & overall safety.

    it's not hard to find, here's how to again .. google LiFePO4 motorcycle battery or li-ion motorcycle battery .. it will be one of the first unpaid results. by the way .. thanks for asking .. it's my belief that when one is searching for technical details on certain topics ..high traffic forums...
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    LiFePO4 abuse tolerance & overall safety.

    there's a world of difference between real world performance and what goes on in a lab. back in 2003 era I was part of the original core group right here on Candlepower forums that were among the world first consumer use for individual li-ion cells. back then it was hard just to get battery...
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    LiFePO4 abuse tolerance & overall safety.

    above is categorically wrong and unfortunately too common a response. ALL 12v li-ion motorcycle batteries use 4x LiFePO4 in series and/or series/parallel configurations without modification to stock 12v charging systems. it's not possible to use Li-Co chemistries without charging system...
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    New walmart Duracell battery

    just purchased 8x AA + 2x AAA ion core Duracell battery pack from Sams for $20 good to hear these deliver better than rated mah specs
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    Newbie charger recommendation for 18650

    have been charging at 2C for LiCo for 10 years with no issues .. really amazing that a $20 charger is even being considered for LiCo cells .. especially when hobby chargers have been at $40 level for years. chemistries are constantly changing, hence newer 4.35 cells .. but fundamentals remain...
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    What is "real" truth about IFR (LiFePO4) cells?

    switching to single cell voltage for this example .. full charge is reached at 3.65v with a resting voltage of 3.56v range .. but at first draw voltage almost immediately drops to 3.325v range .. then discharge curve remains almost completely flat. initial drop means almost nothing in terms of...
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    What is "real" truth about IFR (LiFePO4) cells?

    yes a 6v LiFePO4 uses 2x cell in series. divide chart by half gives accurate readings. for my example I'm going to stick with 12v LiFePO4 which is the most commonly adopted form factor. reason why 12v LiFePO4 is taking the motorcycle world by storm .. it's the cheapest way to drop weight on an...
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    What is "real" truth about IFR (LiFePO4) cells?

    adoption for 12v LiFePO4 batteries for motorcycles is happening at a dramatic rate. LiFePO4 has many advantages over other Li-ion chemistries. the world's internal combustion vehicles runs off 12v or 6v or multiples of .. just so happens charging systems for ALL 12v PB matches perfectly with ALL...
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    Charger for nihm and li-ion ?

    hi Silver .. hope all is going well .. you folks probably already know this but Silver is one of the most knowledgeable tech's anywhere. this is the most versatile charging station I've been able to find .. Cellpro Powerlab8 able to charge at 40amp rates .. provided a large enough power...
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    Life expectancy of LiPO battery

    been using Lithium cobalt or li-ion cells for 10+ years .. we on CPF were among world's first consumer of individual LiCo cells. lots of explosions back then .. have got a stash of LiCo cells dated 2003 stored in my battery drawer at room temps. same cells have been used continuously for 10...
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    Akaline Battery Leakage/Usage Poll (Part 2)

    Re: The Alkaleak Thread AAA alkaline leak the worst of all batteries that I've personally used.
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    Safe chemistry LiMN 3.7V rechargeable batteries?

    yup discharge curve is almost flat once voltage makes initial drop .. so yes a very accurate volt meter would be necessary to determine state of charge. note in 12v or 4x series configuration voltage differences is multiplied. so a voltmeter with normal accuracy range will work fine. for all...
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    Safe chemistry LiMN 3.7V rechargeable batteries?

    not true .. state of charge can be determined easily by a simple voltage reading. for single cell that takes a precision volt meter which the average consumer doesn't have. but for four cell in series like for 12v Motorcycle LiFePO4 batteries. it's easy to determine state of charge with a VOM...
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    Safe chemistry LiMN 3.7V rechargeable batteries?

    thanks .. let's say cells are charged to 4.2v each .. typically LiCo will drop very little for a brand new cell. then progressively drop further as cells age. what's the typical drop for LiMn2O4 from 4.2v per cell? LiFePO4 in 4x series 12v configuration when charged to 14.6v (100%) without BMS...
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