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Home Made SmartPhone PowerBank

Ravindu Prabash

Feb 2, 2017
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Feb 2, 2017
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I want to make a powerbank using a 7.2V 2500mAh rechargeable battery pack to charge my HUAWEI smartphone with 2000mAh 3.8V battery.Is it possible and effective? and How?
 

Harald Kapp

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Nov 17, 2011
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You can find a lot of information searching for "build your own power bank" on the internet.

The gist of it is that your power bank needs to have a voltage regulator to create a 5V output on a USB port. You can then use the standard USB charge cable to charge your smartphone.
You will also need a charge controller to be able to charge the batttery pack within your power bank from e.g. a mains power source.
Is it possible and effective?
Possible? Yes, see above.
Effective? Yes, if you use a switch mode voltage regulator. A linear regulator could be used here, too, but with less efficiency.
 

Ravindu Prabash

Feb 2, 2017
2
Joined
Feb 2, 2017
Messages
2
You can find a lot of information searching for "build your own power bank" on the internet.

The gist of it is that your power bank needs to have a voltage regulator to create a 5V output on a USB port. You can then use the standard USB charge cable to charge your smartphone.
You will also need a charge controller to be able to charge the batttery pack within your power bank from e.g. a mains power source.

Possible? Yes, see above.
Effective? Yes, if you use a switch mode voltage regulator. A linear regulator could be used here, too, but with less efficiency.
ThankYou
 
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