Illustrated steps on how to use 9V batteries to transform mobile phones and tablet power banks

Although the power bank It is very cheap, but in fact the battery capacity using 9V point battery is relatively large; we can transform the 9V battery and use it to DIY a mobile power bank!

The first step , first use electric heat welding to weld the wires connecting the USB socket, transformer and 9V battery interface together.

The second step , after the welding is completed, it will look like this in the picture. Each wire needs to be connected in place so that it can operate normally.

The third step is to cut out several 10 cm long foam blocks, then use hot melt glue to paste them into the shape of the box, and put the USB The interface is also glued on the short side.

Step 4 , use hot melt glue to fix the newly welded circuit in the foam box, then connect the 9V battery and put it inside.

Finally, connect the phone with the data cable and you can see that the battery can really be charged normally. If you take this homemade power bank with you when you go out, you can charge your phone unlimitedly as long as you can buy a 9V battery in a store.