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Thread: Test/Review of Keeppower 16650 2000mAh (Black)

  1. #1
    HKJ's Avatar
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    Default Test/Review of Keeppower 16650 2000mAh (Black)

    Keeppower 16650 2000mAh (Black)



    Official specifications:
    • 16650 2000mAh Protected Rechargeable Battery
    • Min Capacity: 2000mAh
    • Typical Capacity: 2100mAh
    • Normal Voltage: 3.7V
    • Quality Lithium Ion rechargeable cell
    • In Built Safety Circuitry
    • Protection Circuit (Against overcharge, over discharge, over current and short-circuit.)
    • 4.3 volts max voltage and 3.6-3.7 volts nominal voltage




    This battery is a 16650, i.e. it the diameter is less than 18650 batteries, this makes it a good battery for 2xCR123 substitution in lights that are to tight for a 18650.
    To get the full capacity from the battery it must be charged with a 4.3 volt charger.








    The protection PCB restrict the current to somewhere between 2 and 3A continuous load.









    The protection PCB stops this test premature.



    The batteries can hand about 3.3A for a short time.





    Test with 4.2 volt charging



    When charged on a 4.2 volt charger, there is about 80mAh capacity loss.

















    Conclusion

    The battery size is interesting and can be useful and because it is a new generation LiIon it has better capacity than 17670 batteries, even when only charged to 4.2 volt. As long as it is used to replace CR123 batteries, the current limit will seldom be a problem.
    All in all I will rate it as a good battery.



    Notes and links

    Keeppower is a OEM manufacturer, i.e. many of the batteries they produce is sold with other names on them.

    The batteries was supplied by Keeppower for review.

    How is the test done and how to read the charts
    How is a protected LiIon battery constructed
    More about button top and flat top batteries
    My website with flashlight, battery and charger information: lygte-info.
    More than 200 battery reviews and 80 charger reviews.
    Compare 18650 LiIon batteries or smaller (RCR123, 16340, 14500, 10450) LiIon batteries.

  2. #2
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    Default Re: Test/Review of Keeppower 16650 2000mAh (Black)

    Do these use the LiNiCoO2 NNP cell design?
    Will the 17670 ever increase in capacity?

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    Default Re: Test/Review of Keeppower 16650 2000mAh (Black)

    Quote Originally Posted by MichaelW View Post
    Do these use the LiNiCoO2 NNP cell design?
    That is a Panasonic technology and this cell was designed by Sanyo (Sanyo is now a part of Panasonic). The Sanyo datasheet does not specify anything about cell design.

    Quote Originally Posted by MichaelW View Post
    Will the 17670 ever increase in capacity?
    Depends, if some manufacturer want to use a few millions cells in that size, the large LiIon manufacturer might update the design.
    My website with flashlight, battery and charger information: lygte-info.
    More than 200 battery reviews and 80 charger reviews.
    Compare 18650 LiIon batteries or smaller (RCR123, 16340, 14500, 10450) LiIon batteries.

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    Flashaholic* BenChiew's Avatar
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    Default Test/Review of Keeppower 16650 2000mAh (Black)

    Any news updates on this battery? Perhaps from someone that has used it.
    Any issues with usage and charging?

  5. #5
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    Default Re: Test/Review of Keeppower 16650 2000mAh (Black)

    Quote Originally Posted by Benchiew View Post
    Any news updates on this battery? Perhaps from someone that has used it.
    Any issues with usage and charging?
    I am using this battery in a Surefire G2X pro but i havent done any runtime tests and i charge it with a Nitecore intellicharger I4 V2.No problems so far

  6. #6
    Flashaholic* LEDAdd1ct's Avatar
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    Default Re: Test/Review of Keeppower 16650 2000mAh (Black)

    HKJ, what say you?

    How is this cell holding up?
    "...and the diode multiplied and grew in brightness. And God saw that it was good."

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    Default Re: Test/Review of Keeppower 16650 2000mAh (Black)

    Quote Originally Posted by LEDAdd1ct View Post
    HKJ, what say you?

    How is this cell holding up?
    Being a Sanyo cell, I would not expect any problems with lifetime, but I have no data on it.
    My website with flashlight, battery and charger information: lygte-info.
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    Flashaholic* LEDAdd1ct's Avatar
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    Default Re: Test/Review of Keeppower 16650 2000mAh (Black)

    Roger that.

    Thank you.

    Now that Sanyo is a (subsidiary?) of Panasonic, what will happen to Sanyo branded cells?
    "...and the diode multiplied and grew in brightness. And God saw that it was good."

  9. #9
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    Default Re: Test/Review of Keeppower 16650 2000mAh (Black)

    I have a couple of lights that could use these batteries, but I have a couple of questions:

    1) How much capacity is lost at 4.3v versus 4.3v?

    2) Why 4.3 when 4.2 seems to be the standard?

    3) Will a typical protected cell by other mfr charge safely in a charger that outputs 4.3v?

    4) Is there a good charger that can do multiple different batteries and 4.3v that you'd recommend? I'm thinking 26650, 18650, maybe 17670, and possibly some aa type shorts.

    The Thrunite MCC-4 looks decent, but is 4.2v and a USB out would be handy.

  10. #10
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    Default Re: Test/Review of Keeppower 16650 2000mAh (Black)

    Quote Originally Posted by Diesel Pro View Post
    I have a couple of lights that could use these batteries, but I have a couple of questions:

    1) How much capacity is lost at 4.2v versus 4.3v?
    Please check the review, it contains data for both 4.3 volt and 4.2 volt.

    Quote Originally Posted by Diesel Pro View Post
    2) Why 4.3 when 4.2 seems to be the standard?
    This is one way to increase capacity.

    Quote Originally Posted by Diesel Pro View Post
    3) Will a typical protected cell by other mfr charge safely in a charger that outputs 4.3v?
    Mostly, especially with cheap batteries there is an increased risk (The big brands are tested that they can handle over charge).
    Using 4.3 volt on a 4.2 volt battery will overcharge the battery and seriously reduce lifetime.

    Quote Originally Posted by Diesel Pro View Post
    4) Is there a good charger that can do multiple different batteries and 4.3v that you'd recommend? I'm thinking 26650, 18650, maybe 17670, and possibly some aa type shorts.
    It looks like Xtar has a new charger that can do 4.35 volt, but I have not tested it yet.
    At the current time the best solution for 4.30 volt is a hobby charger, where the output can be adjusted (Like iCharger), but that adjustment can only be adjusted to 4.30 volt, not 4.35 volt (As some other batteries requires).

    Quote Originally Posted by Diesel Pro View Post
    The Thrunite MCC-4 looks decent, but is 4.2v and a USB out would be handy.
    The usb output on chargers can usual not be used while it is connected to power, only from a battery and for that purpose I will recommend getting a separate usb box.
    My website with flashlight, battery and charger information: lygte-info.
    More than 200 battery reviews and 80 charger reviews.
    Compare 18650 LiIon batteries or smaller (RCR123, 16340, 14500, 10450) LiIon batteries.

  11. #11
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    Default Re: Test/Review of Keeppower 16650 2000mAh (Black)

    HKJ, I have two of these cells and just to clarify, is 4.35 volts what the charger will have to put out?

    I am going to be buying an XTAR SP1 for some LG D1 cells (I will be buying those D1 cells at the same time as the SP1), but it appears there are 4.3 volt cells as a different class or something.

    Are 4.35 and 4.3 volt cells the same thing or is it just semantics that is causing this confusion?

    This review says 4.3 volts, but cottonpicker's charger and the XTAR SP1 both say 4.35 volts, for example, so is this cell not okay to use with the cottonpickers 4.35v charger or the XTAR SP1?

    edit: my two 16650 2000 mAh cells I actually bought because of your review!

    I see you kind of answered this question in the post above, but I'm not entirely clear still on if 4.3 vs. 4.35 is a huge difference or just a semantics thing or they shouldn't be mixed lol
    Last edited by tobrien; 01-10-2014 at 12:15 PM.
    aka Edgar Allan Bro, Brosama Bin Liftin, Walter Crunkite, Bro Namath, Teddy Brosevelt, and the Tomahawk Crunkmissile.
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  12. #12
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    Default Re: Test/Review of Keeppower 16650 2000mAh (Black)

    Quote Originally Posted by tobrien View Post
    HKJ, I have two of these cells and just to clarify, is 4.35 volts what the charger will have to put out?

    I am going to be buying an XTAR SP1 for some LG D1 cells (I will be buying those D1 cells at the same time as the SP1), but it appears there are 4.3 volt cells as a different class or something.

    Are 4.35 and 4.3 volt cells the same thing or is it just semantics that is causing this confusion?

    This review says 4.3 volts, but cottonpicker's charger and the XTAR SP1 both say 4.35 volts, for example, so is this cell not okay to use with the cottonpickers 4.35v charger or the XTAR SP1?
    There are both 4.30 and 4.35 volt cells, they are not the same thing.

    Using a 4.35 volt charger on a 4.30 volt will overcharge it and reduce the lifetime of the cell.
    My website with flashlight, battery and charger information: lygte-info.
    More than 200 battery reviews and 80 charger reviews.
    Compare 18650 LiIon batteries or smaller (RCR123, 16340, 14500, 10450) LiIon batteries.

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