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Plastic box, upgrade to lithium battery charger!

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Make three exquisite boxes.
Place the 4056 charging pad in the narrow end of the box.

Put the spring on the other end and do the negative pole.

Put a copper plate as a positive pole in the front end.

Make a charging line.
I changed the inner core of the phone line.

Open two holes in the head,and put the USB cable on the welder.

Cut down a piece of plastic for the indicator light window.
The appearance after putting on is as follow, and the above shows the power indicator.

Add a charging head to test.
Put in a section of 18650 lithium battery and charge directly.

After charging, the transformation of battery voltage was successful.

For the convenience I made two chargers, which charge 18650 conveniently and quickly.

Making finished, welcome to discuss.