Why are power bank charging cables so short? A quick explanation

Why are power bank charging cables so short? Do you ever wish that you had a longer charging cable? This blog post explains it concisely and in plain English.

The power situation in the country despite all the investments still hasn’t got to a point where we start getting steady consistent power supply, so it’s no doubt things like generators, inverters, extra batteries and power banks are a must have in these parts.

Speaking of power banks, they usually come with a short USB cable with which you charge your device. Some people prefer using the long USB cables that come with their phones, but its actually wrong. Rather look for a short USB cable to use.

Why are power bank charging cables so short? A quick explanation 1

So, why are power bank charging cables so short?

Longer USB cables have a longer length of wire inside tem and this implies more resistance. Physics people understand this better. The longer the cable, the more resistance it offers, and the more the resistance, the more current it saps.

In simpler terms, this means if you use a longer USB cable, your power bank will run down faster and deliver less charge to your phone than if you use a shorter USB cable.  That, dear friends, is why power bank charging cables are so short.

why are power bank charging cables so short

If you doubt that, try the experiment yourself. Use a long USB cable on your power bank. Note how long your power bank lasts. Then subsequently use a shorter USB cable, and also note how long it will last. Before each trial, make sure the power bank is fully charged so you can get more precise results.

After this discovery, I duly, kindheartedly cuddled my old Nokia short USB cable for use with my power bank.

Short Usb cable
The old lady creaks of age, worn and tear, but I fastened her with a masking tape to hold its ends in place. This cable or any other short USB cable you can find is ideal for use with power banks. There is less wastage of energy, and you want as little wastage as possible with a power bank.

Now you understand why power bank charging cables are so short. If this article has been of help, do use the sharing buttons below and spread the knowledge.

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14 comments

  1. There Are People Thrifty With Money. That’s Are Those Stingy With Love. But Being Thrifty With Electricity. ? Haha!

    I Beg, How Much Difference Will It Make, This Length Of Cable Thingy..?

    Meanwhile, Thank You For Reminding Of My Physics.

    Resistance = Length/Area.

    The Thicker The Wire, The Less Resistance

    The Longer The Wire, The Higher The Resistance.

    Thanks For The Tip!

  2. Thanks man. Was wondering why my new power bank was running down quick using my trusty old BB cable.
    The physics thing was a trip. Ah the memories…..

  3. I have noticed that my blackberry Z10 is very selective of the USB cable used to charge it , especially with a power bank. Using my 2 different power banks, an IWo and a Ravpower power bank, the phone outrightly refuses to charge or charges very slowly if not using the OEM blackberry cable it came with.
    I have tried a short Nokia cable on it with no luck . I have also tried older nokia Microusb cables with no luck.
    All cables are not the same. Even 2 cables that are the exact same length may behave differently.

  4. hello sir @ Eye_Bee_Kay that your equation is not correct .You didn’t add the sign of the constant rho which by so doing nullifies the equation.

    1. Just to explore the tip about extending the service of the power bank.

      I have a short cable for other devices but not for iPhone

      ThNks @Kaylese Emele



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