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I have used many Arduino boards with adapters and other power supplies. While connecting with a powerbank for portable projects I have noticed that the power goes off after a couple of seconds and then turn on again after sometimes. Why this is happening with power bank?
I have used following powerbanks:

  1. Basus
  2. Xiaomi
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  • refer to the powerbank datasheet for minimum and maximum allowable load Commented Dec 8, 2020 at 0:18

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Most USB powerbanks will automatically turn off if there is not a minimum current draw to keep them turned on. The Arduino is obviously drawing current below the limit for the devices you have.

A couple of options:

  1. Add some additional load to keep the powerbank on indefinitely. Of course this may waste power but that's part of the price to pay.
  2. Find a power bank that is less sophisticated. I have one with a manual on/off switch. It powers the Arduino just fine until it runs out of power.
  3. Find a different powerbank that has a lower threshold for staying on. Some vendors give you this spec and others don't.
  4. Modify the powerbank to stay on. I'm not sure there is a general way to do this but you might experiment with it and see.
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  • Any links to indicate power banks automatically turn off below a certain current or power threshold after a certain time would be useful, even if they are just links to user manuals you are familiar with. Commented Dec 8, 2020 at 2:23
  • I thought it was a working method of powerbank . Thanks for the suggestion. Commented Dec 8, 2020 at 4:15

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