Recent content by bspofford

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    Best place to get the NCR18650GA?

    I don't know Richard but asked him to clarify the matter. He hasn't responded to my inquiry. The following listing on Amazon also discloses that the batteries have used Panasonic NCR18650B cells (400 cycles), and the customers generally consider them a good deal...
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    Best place to get the NCR18650GA?

    As you know, Panasonic makes NCR18650B cells, but protected batteries are typically assembled in China by third parties like EVVA. I used to write technical documents for use in Japan and China, so I am quite aware that vocabulary and syntax may be issues. Bearing this in mind, how can you be...
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    Best place to get the NCR18650GA?

    I've recently purchased three pairs of highly rated EVVA batteries from Mountain Electronics including 3400mAh Panasonic NCR18650B, 3500mAh Panasonic 18650GA and 3500mAh LG 18650MJ1 variants. More recently, I visited EVAA Technology's home page and was disappointed that their flashlight...
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    Battery Capacity, Discharge Curves and Flashlight Runtime - Cheaper May Be Better

    Good point. These Samsungs reportedly have 9.762Wh while the Panasonics have 12.123Wh, but the discharge energy curves show that at 2.0A the Samsungs provide 8Wh by 3.4V while the Panasonics provide only 6.5Wh. Although the NCR18650B cells are rated at 3400mAh and the ICR18650-26F cells are...
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    Battery Capacity, Discharge Curves and Flashlight Runtime - Cheaper May Be Better

    The 2600mAh Samsung ICR18650-26FM batteries bought from GearBest @ four for $12.14 are protected. The measured capacity with 0.5A discharge on my Foxnovo F2 was right around 2700mAh, so my Nitecore P16 starts flashing at about 3.6V or 50% residual capacity. Nitecore advertises a 1:45 runtime on...
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    Battery Capacity, Discharge Curves and Flashlight Runtime - Cheaper May Be Better

    The matter of runtime obviously depends on the emitter and circuit, and I should have clarified at the beginning of this thread that my 2015 reference point is a single battery 18650 XM-L2 flashlight (e.g., Nitecore P16). My reading of CREE data sheets causes me to believe that 3A is the highest...
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    Battery Capacity, Discharge Curves and Flashlight Runtime - Cheaper May Be Better

    The battery comparator tool shared by SubLGT is very useful and allows two batteries to be compared at different discharge rates. Comparing the Samsung ICR18650-26F and a representative Panasonic NCR18650B (KeepPower 3400mAh Black) at 1A discharge rate, the Samsung outperforms the Panasonic down...
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    Battery Capacity, Discharge Curves and Flashlight Runtime - Cheaper May Be Better

    I've recently purchased many 3400mAh Panasonic variants priced between $6 and $20 from GearBest, Banggood, Ebay, Amazon and some well-respected sellers. The name brand assemblers like NiteCore, Olight, Foxnovo, and KeepPower do print 3400mAh on the skin placed over the apple green Panasonic...
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    Battery Capacity, Discharge Curves and Flashlight Runtime - Cheaper May Be Better

    Thanks for sharing this great reference. The interactive battery comparator toward the bottom is very useful, and I ran a number of scenarios with Samsung ICR18650-26F and various other batteries at 1A and 2A. It seems to support my preliminary conclusion that its hard to get more mAh above 3.4V...
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    Battery Capacity, Discharge Curves and Flashlight Runtime - Cheaper May Be Better

    My recent purchase of several Foxnovo chargers has allowed me to measure the capacity of various 18650 protected batteries. My measurement of multiple samples of Nitecore, Foxnovo, Olight and other 3400mAh-rated batteries based on Panasonic NCR18650B cells indicates that they all have about the...
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    marking or labeling batteries?

    Best of both worlds is to use p-touch label with a clear wrap over it.
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    Suprise! Fenix E10 Landed - w/Pics

    $17 "Special Buy" at REI online today. Website not working, but ordered by phone for same price.
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    A penlight for checking mouths

    I'm a mouth (ENT) doctor and have been a professor responsible for teaching ENT examinations. I also collect LED flashlights, but for oral examinations I use freebie incan AAA X 2 penlights that are given by drug reps for free. Some are disposable, but most have thin aluminum bodies and...
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    Solarforce L2 / L2P forward clicky.

    Lighthound has three styles of forward clicky tailcaps, and they're all HA-III in black to match the L2P black. Each is $8.99 which is less than other retailers in the US and China. If you buy some other stuff, you can also get free shipping.
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    New 500 lumen MCE light from... Coleman!!

    Coleman = Cra*p! Spend $80 at DX and get two MCE lights.
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