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Which AC Adapter for Charging 18650 Cells in Bike Lamp: 10V 3.5A, 12V 1A, or Other Option?

crizal 3294 8
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 16700998
    crizal
    Level 12  
    Welcome.
    I have a bike lamp powered by 18650 cells. 4 cell package.
    Can I use a 10V 3.5A or 12V 1A power supply to charge the cells? and if none of them is what should I buy?
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  • #2 16701005
    miecho18
    IT specialist  
    Write how the links are connected.
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  • #4 16701028
    miecho18
    IT specialist  
    crizal wrote:
    Just like here, only 4 batteries.

    In this photo, the links are connected in parallel.
    You need a charging module with 4.2V output voltage and 2-3A current efficiency.
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  • #5 16701038
    crizal
    Level 12  
    Hmm, I just asked a friend who soldered it to me with a soldering iron because I would not solder anything into it, he writes that after subtracting these two middle links I have a type connection: 2 cells in series 2 in parallel ... Yes?
  • Helpful post
    #6 16701042
    miecho18
    IT specialist  
    Yes, a mistake on my part. You have a mixed connection. You need a circuit that outputs 8.4V. 2A current efficiency is enough.
  • #7 16701046
    crizal
    Level 12  
    Thank you.
    And if I charge them with a 10V 3.5A power supply? Because I have the closest one for now. I have to look for another ...
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  • #8 16701047
    miecho18
    IT specialist  
    This power supply is not suitable. You will damage the links.
  • #9 16701050
    crizal
    Level 12  
    OK thank you.
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Topic summary

The discussion revolves around the appropriate AC adapter for charging a bike lamp powered by a 4-cell package of 18650 batteries. The user inquires whether a 10V 3.5A or 12V 1A power supply can be used for charging. Responses clarify that the battery configuration is a mixed connection of 2 cells in series and 2 in parallel, requiring a charging module with an output of 8.4V and a current efficiency of 2A. It is advised against using the 10V 3.5A power supply, as it could damage the batteries.
Summary generated by the language model.
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