How to stop a power bank from turning off

power bank auto off
power bank auto off

We use power banks for charging our phones but we can use power banks to run many gadgets. We can use power banks to run LED lights, electronic hair trimmers, etc. 

Also, we can use power banks for Electronic project testing. I always use a power bank for my Robotics & Arduino-based project testing.

But the problem is that all new design power banks now have a protection circuit for overcharging, over-discharging, power bank auto cut off, etc.

Those are all excellent features for power banks’ health but the power bank auto-off feature is a problem for some users who use power banks for other work except phone charging.

the power bank turns off automatically when an input load minimum of 100mah is not detected.

If you turn on your power bank manually it will automatically turn off after a few seconds. The time is vary from 10 sec. To 30 sec. & it depends on the power bank.

It is a good feature of the power bank to save energy & backup time.

Power bank disable auto power off

We will make a simple electronic circuit to temporarily disable the power bank auto power off feature. It is a USB Type-A plug when we insert it into a power bank it stays awake.

power bank auto off problem solved
power bank auto-off problem-solving

How does it work

To stop power bank turning off we are using a timer ic 555. This circuit will give to power bank a 100 mAh load using 33 ohms for 3 sec. In every 6sec. You can see the LED indicator. The LED glows for 3 sec after every 6 sec.

power bank auto off problem solved
power bank auto-off problem solved

You need to make

  • Small perfboard
  • USB A type male & female 
  • IC 555 & 8 pin IC base
  • 10 mfd / 25 volt electrolytic capacitor 
  • Transistor BC 548B
  • Resistor – 33 ohms, 1M, 270K, 220 ohms, 1K
  • Diode IN 4148
  • LED

Video tutorial

Circuit Diagram

simple electronic circuit to temporarily disable the power bank auto power off feature. It is a USB Type-A plug when we insert it into a power bank it stays awake.
simple electronic circuit to temporarily disable the power bank auto power off feature. It is a USB Type-A plug when we insert it into a power bank it stays awake.

Download circuit diagram

power bank auto off problem solved
power bank auto off problem solved

Make this circuit on a perf board. You can use a bigger perf board if you are a beginner. You can use a USB cable if you have a problem arranging a USB male connector.

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