Recent content by littlebattery

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    source for LiPo batteries in various sizes

    Hello - I have a project I'm working on that needs a 2s1p battery that fits in a ~square cavity. LiPo seems better than LiIon here as I can get close to filling up the whole availalbe volume ... if I can find a source for single-digit quantiies. The space is approximately 50mm x 55mm x 25mm...
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    recommendations for BRIGHT mountain bike like (bar mount)

    Hello - I'm looking for help finding a BRIGHT light for night riding. Requirements: separate battery/head (eg, so it is bar-mountable in some form) > 1000 lumens I have an olight mini-intimidator-ii (1600 lm on NON-turbo); that bright would be sufficient. 2+ hours battery life at >...
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    does this charge/discharge curve show these batteries are LiFePO4

    I found what looks to be a somewhat knowledgeable industry site that shows discharge profiles. http://www.powerstream.com/lithium-phosphate-charge-voltage.htm From that site, it appears plausible that these are in fact LiFePO4, despite having a resting voltage of 4.15v out of the...
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    orbtronic cr2 batteries - mislabeled as LiFe ?

    I decided to try to capture accurate charge/discharge curves for the batteries, in the hopes that someone could definitively answer this. Because I think that specific question based on discharge curves is valuable to the community in it's own right, and not specific to this thread/question...
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    does this charge/discharge curve show these batteries are LiFePO4

    Hi all - I was having some trouble having confidence some batteries i received from a well-known vendor were actually LiFePO4 as labeled. They are the less-common cr2 / 15270, labeled as LiFe, but came intentionally with a charger that is intended for normal 4.2v termination / "LiIon"...
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    orbtronic cr2 batteries - mislabeled as LiFe ?

    Yep - the cell phone pics came out pretty blurry; that url on the batteries is indeed www.soshine.com.cn. The soshine "3.0v liIon" batteries linked at @Gauss163's link are clearly labeled as LiIon, not LiFePO4 ... have you heard in the past about mis-labeling, or just the concept of putting...
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    orbtronic cr2 batteries - mislabeled as LiFe ?

    yes. They did reply quickly. However, they haven't really given me a straight answer. They pointed out that LiFe are generally safer than other chemistries, and that one can typically safely over-charge them. Regarding the cells having a higher than expected resting voltage, they said...
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    orbtronic cr2 batteries - mislabeled as LiFe ?

    I'm (clearly :) ) no battery expert -and neither are most posters on the net, generating most of the info that comes up in google results- so I'm not confident I've interpreted the info correctly. That said, it seems the resting / quiescent open-circuit voltage should be ~~3.3v, definitely not...
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    orbtronic cr2 batteries - mislabeled as LiFe ?

    I bought some CR2 rechargeables, and matching charger (since most every other charger supports RCR123 as the minimum length) from orbtronic.com https://www.orbtronic.com/batteries-chargers/cr2-rechargeable-lithium-batteries-CR2-charger They are labeled 3.0v, LiFe (Li-FePO4). However, they are...
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    "storage charge" for li-ion / 18650 - chargers and voltage

    I hacked together a "6 cell battery pack" based on a cheap xtar 6-cell slider charger, and added RC power and balance connectors. Unfortunately what i found is that this tends to exercise the fail-safe error checks in my rc charger. It seems that In a real rc pack, the batteries start...
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    source for *bodies* for nitecore lights (run Head/tail MT10c with body MT20c)

    pic of sizes:
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    charger (or spacers) to charge cr2 / 15270 / 15266

    yep, unfortunately it appears. Maybe once (?) cr2's become more popular this will be fixed. good idea with the magnets. I just tried some I had laying around, I was surprised they didn't conduct very well. I will look for some chrome-plated ones. Tha Thanks all.
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    Free animated gif image hosting server?

    HA for once, replying to a zombie thread is actually the point :) @ElectronGuru; you posted this a long time ago - in your TinyPic here, and in _some_ of the pics on the example thread linked to in another reply here, the TinyPic image url is not working. How has the service been? Have...
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    source for *bodies* for nitecore lights (run Head/tail MT10c with body MT20c)

    Measuring my MH27uv (18650, 1000lm w/ rg-uv), CB6 (18650, 500lm w/ blue), and mt10c (18350, 900lm w/ red) I can see the threads on top/head for the bigger two lightes are both the same diameter, but the total length of the 'mating area' is different. The top/head threads on the mt10c are the...
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    effeciency, specific cuttoffs for nitecore F1

    looks like the F1 does 500ma discharge quite well, approaching 90% effeciency. 1000ma (which, is what my phone would charge at) is not a good, low-mid 80% efficiency, but with some problems maintaining 5v out after a time. Also, reading the reviews i learned of the LiitoKala-Lii-100; not quite...
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