Emergency Power Bank(DIY)
by Useless Engineer in Circuits > Mobile
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Emergency Power Bank(DIY)

Hi friends
In this instructable we are going to see how to make a power bank out of AA batteries
Things Required
- battery box
- AA battery
- OTG cable
- USB charging cable

solder the battery holders together to form a 4AA size holder

Then solder the battery box with OTG cable

Now place the battery on the battery box

Now connect the phone with the USB cable
.Then you can able to see the phone is charging