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Maximizing the Usage of Li-ion 18650 Batteries: Applications, Sales Ideas, and Pricing Guide

Kalvi 9717 8
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  • Seeking uses and resale pricing for 18650 cells

    #1 16372366
    Kalvi
    Level 7  
    Posts: 16
    Rate: 1
    I have several Li-ion 18650 batteries at home. I have no idea what I can do with them. Some are bought online and others are from laptops, all functional, voltage above 2.5V, and most above 3.5V. Where could I use such batteries, or is it worth selling them, if so where and for how much. On one page I saw 2,600mAh for PLN 13, would it be worth selling my (with similar capacities) for PLN 10?
    Any advice, ideas and suggestion would be appreciated.
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  • Used 18650 cells have uncertain capacity and scrap value

    #2 16372434
    Artur k.
    VIP Meritorious for electroda.pl  
    Posts: 25889
    Help: 1279
    Rate: 1701
    Kalvi wrote:
    On one page I saw 2,600mAh for PLN 13, would it be worth selling my (with similar capacities) for PLN 10?

    And you would buy a battery from an uncertain source for PLN 10, being able to add PLN 3 and buy a new one?
    On Volume you can buy batteries from disassembly of tablets with capacities of 5000mAh at a price of 5-10 PLN. They have all the boxes, not many eager.

    Your batteries, regardless of their condition, have a scrap value because they are not new and it is not known whether they are functional. Just because they have some voltage does not mean that they are functional and hold capacity.
    If you don't know what to do with it, give it away because you won't break the property anyway. Unfortunately, that's the truth.

  • Used 18650 cells have mostly scrap value

    #3 16372448
    Kalvi
    Level 7  
    Posts: 16
    Rate: 1
    Artur k. wrote:
    Kalvi wrote:
    On one page I saw 2,600mAh for PLN 13, would it be worth selling my (with similar capacities) for PLN 10?

    And you would buy a battery from an uncertain source for PLN 10, being able to add PLN 3 and buy a new one?
    On Volume you can buy batteries from disassembly of tablets with capacities of 5000mAh at a price of 5-10 PLN. They have all the boxes, not many eager.

    Your batteries, regardless of their condition, have a scrap value because they are not new and it is not known whether they are functional. Just because they have some voltage does not mean that they are functional and hold capacity.
    If you don't know what to do with it, give it away because you won't break the property anyway. Unfortunately, that's the truth.

    I do not intend to make a fortune, but since they are no longer useful to me, I would like to earn at least a few pennies or use them in something else. The only question is what. What could you do with them, beyond power banks?
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    #4 16372459
    Anonymous
    Level 1  
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    #6 16372476
    Artur k.
    VIP Meritorious for electroda.pl  
    Posts: 25889
    Help: 1279
    Rate: 1701
    Kalvi wrote:
    What could you do with them, beyond power banks?

    Can be used to power almost any mobile device. You just need a little imagination.
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  • #7 16372673
    yogi009
    Level 43  
    Posts: 14697
    Help: 848
    Rate: 2655
    Make a lighting supply (and cell charger) for the bicycle.
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    #8 16372745
    WędkarzStoLica
    Level 31  
    Posts: 1511
    Help: 146
    Rate: 300
    On the basis of some old radio you can do 3in1
    Portable radio with a flashlight and powerbank.

    Old screwdrivers, shavers, flashlights - I have all changed at home.
    In the bike I also have all the lighting on 18650.
  • #9 21870398
    Amadek
    Level 11  
    Posts: 41
    Help: 1
    Rate: 11
    >>16372366
    Buy a 2-in-1 Xtar PB2S powerbank-charger like the one here: https://9c.pl/elektronika/ladowarki/xtar-pb2s-blue .
    You can put 18650 rechargeable batteries into it and use them like a powerbank and at the same time you can charge them with this charger.
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Topic summary

LABEL_AI_GENERATED
The discussion concerns what to do with used Li-ion 18650 cells from laptops and online purchases, with the main conclusion that such batteries have low resale value unless their capacity and condition are verified. Participants note that cells from unknown sources are risky to sell, even if they still show voltage above 2.5 V or 3.5 V, because voltage alone does not confirm usable capacity or health. Suggested uses include flashlight packs, bicycle lighting and charger supplies, portable radios with flashlight and powerbank functions, soldering irons powered by 18650 cells, and other mobile devices. One recommendation is to repurpose the cells in a 2-in-1 powerbank/charger enclosure such as the Xtar PB2S, which allows charging and using the cells as a powerbank. Selling is described as possible only at scrap-level prices, with examples of low-cost used cells and advice that giving them away may be more practical than trying to profit from them.
AI summary based on the discussion. May contain errors.
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