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BatteryBench: A Protocol for Testing Portable Battery Chargers and Electronic Devices for Backpacking


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Home Forums Campfire Editor’s Roundtable BatteryBench: A Protocol for Testing Portable Battery Chargers and Electronic Devices for Backpacking

Viewing 8 posts - 1 through 8 (of 8 total)
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  • #3734773
    Rex Sanders
    BPL Member

    @rex

    Locale: California

    Companion forum thread to: BatteryBench: A Protocol for Testing Portable Battery Chargers and Electronic Devices for Backpacking

    Rex Sanders runs through an extensive protocol for testing portable battery chargers and electronic devices.

    #3734936
    Marcus
    BPL Member

    @mcimes

    Great start Rex. I’m be interested to see how the Nitecore 10k bank performs too. I could probably send you one for a couple weeks to test if you want. PM me if so.

    Another point I’ve noticed – I have a 2 or 3 year old S10+ and also a brand new S10E work phone. I realize the E has a smaller battery than the S and am taking that into account into my remarks. It seems to me (based on observation only, no testing behind this) that as a Li battery ages, it both looses capacity but also becomes harder to charge. The brand new phone (and my S10+ when it was new to ~1 year old) seem to take a charge easier and require less energy from the battery bank. Is there any scientific basis to that or is it just in my head? If there is a basis, one more factor to consider is how many cycles your receiving battery has on it. I guess your watt meter wouldnt really test this, it would just have to be something the user keeps in the back of their mind.

    #3734950
    Rex Sanders
    BPL Member

    @rex

    Locale: California

    Marcus,

    Nitecore NB10000 test results coming to an online publication near you soon(ish).

    The chemistry of rechargeable Li-ion batteries is pretty complicated. From my limited understanding, every recharge gradually makes it harder for ions (and electrons) to move back and forth between anode (-) and cathode (+). Don’t know if that also slows down recharging.

    Also, your smartphone charge controller might be working extra hard to extend battery lifespan for the aging battery, at the expense of time and wasted energy. That waste wouldn’t even register on an in-town utility bill, but might make a big difference recharging from a portable battery charger in the backcountry. Would be difficult to test in a reasonable timespan.

    — Rex

    “A Watt-hour here, a Watt-hour there, and pretty soon you’re talking real energy.”

    Not said by Senator Everett M. Dirksen.

    #3735134
    PaulW
    BPL Member

    @peweg8

    Locale: Western Colorado

    What a well-written and useful article this is Rex. I’m on my second reading. Having spent many years working in testing labs, I can appreciate the hard work you put into this. Thank you!

    #3735157
    John Brew
    BPL Member

    @brewbooks

    Locale: Pacific Northwest

    Rex, That was a mighty useful article. I decided to order my own FN48 meter and USB load so that I can test my devices. I have a couple of friends who will also want to test their devices.

    #3735710
    Drew Smith
    BPL Member

    @drewsmith

    Locale: Colorado Rockies

    Hey Rex, great article, which inspired me to order these gadgets in my never-ending quest to optimize absolutely everything in my pack. Plus waste time.

    When I clicked on the link for the USB meter, the model you referred to is no longer available. However, a seemingly equivalent model  “SE” is available on Amazon. This one does save mAh values and so is perhaps more convenient for measuring discharge capacities.

    #3735717
    Jerry Adams
    BPL Member

    @retiredjerry

    Locale: Oregon and Washington

    My USB meter doesn’t calculate watt hours.  I’m tempted to buy one.

    This is so much funner than working where they tell you how to do something in a way that can’t possibly work, and then complain that it’s not working and you have a bad attitude : )

    #3735736
    Rex Sanders
    BPL Member

    @rex

    Locale: California

    Here’s the exact link I used to purchase the USB meter. “Only 17 left in stock – order soon.”

    And the load tester. “Only 13 left in stock …” Lead photo shows two units; you only get one.

    Sometimes strange things happen to Amazon links on BPL.

    And after too many months working on test development and testing, I kinda sorta miss walking down to the basement to run tests. But I’m getting over it :-)

    — Rex

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