How to make a USB charger for Li-ion 18650 batteries

18650 series batteries are one of the most common and frequently used batteries. They are used in flashlights, radios, metal detectors, etc. Radio amateurs have not ignored them and also use them wherever possible. Often the device powered by this battery does not have a built-in charger and the battery must be removed. To charge it, you can use a purchased device or make your own from a piece of PVC pipe. This will be very useful, since usually purchased options are powered from a 220 V network, but this sample can be charged from any USB port.

How to make a charger for Li-ion 18650 batteries

Will need

Manufacturing a charger for 18650 series batteries

We take the charging module and battery holder and place it on a PVC pipe. Add 5 mm on each side and determine how long the piece should be cut. Use a hacksaw to cut off a section of PVC pipe.
How to make a charger for Li-ion 18650 batteries
We apply the holder and, with a margin of 5 mm on each side, cut out the window in the segment.
How to make a charger for Li-ion 18650 batteries
How to make a charger for Li-ion 18650 batteries
We grind off all burrs with a file.
How to make a charger for Li-ion 18650 batteries
We cut the cut-out plug to the size of the battery holder.
How to make a charger for Li-ion 18650 batteries
Glue it to it with super glue.
How to make a charger for Li-ion 18650 batteries
We take a USB connector from a non-working flash drive.
How to make a charger for Li-ion 18650 batteries
Solder the power wires.
How to make a charger for Li-ion 18650 batteries
In 3 mm plastic we mark 3 plugs and cut them out.
How to make a charger for Li-ion 18650 batteries
In one, use a utility knife to make a cutout for a USB connector.
How to make a charger for Li-ion 18650 batteries
Glue the connector with super glue.
How to make a charger for Li-ion 18650 batteries
Solder the chip on the charging module LEDs and solder the usual ones. We bend the output as in the photo.
How to make a charger for Li-ion 18650 batteries
In the upper part of the workpiece we make holes for LEDs.
How to make a charger for Li-ion 18650 batteries
We glue the plug and holder down.
How to make a charger for Li-ion 18650 batteries
We glue in the second plug, making cuts in it for the leads coming from the holder.
How to make a charger for Li-ion 18650 batteries
Solder the module to the holder wires and the USB wires.
How to make a charger for Li-ion 18650 batteries
We install the module with LEDs and fix it with glue. Glue in the last plug.
How to make a charger for Li-ion 18650 batteries
USB charger for Li-ion 18650 batteries is ready!
How to make a charger for Li-ion 18650 batteries
Install the battery into the holder. And we plug the charger itself into a charger with a USB socket from a cell phone.
How to make a charger for Liion 18650 battery
Lights up red Light-emitting diode, indicating that the battery is charging. Once the battery is fully charged, the green light will turn on. Light-emitting diode, and the red one will go out. Now you can take the charger with you and charge it from any USB port: even from a laptop, even from the radio port in the car.

Watch the video

come back
Comment
  • bowtiesmilelaughingblushsmileyrelaxed relaxedsmirk
    heart_eyeskissing_heartkissing_closed_eyesflushedrelievedsatisfiedgrin
    winkstuck_out_tongue_winking_eyestuck_out_tongue_closed_eyesgrinningkissingstuck_out_tonguesleeping
    worriedfrowninganguishedopen_mouthgrimacingconfusedhushed
    expressionlessunamusedsweat_smilesweatdisappointed_relievedwearypassive
    disappointedconfoundedfearfulcold_sweatperseverecrysob
    joyastonishedscreamtired_faceangryragetriumph
    sleepyyummasksunglassesdizzy_faceimpsmiling_imp
    neutral_faceno_mouthinnocent
5+two=
Comments (2)
  1. Oleg
    #1 Oleg Guests March 10, 2021 00:00
    2
    Don’t forget that the TP4065 charging module produces a charge current of 1A. For one weak 18650 this is a lot. The Chinese, perhaps, are hoping to reduce the life of 18650 batteries and increase their sales. Be vigilant, take care of nature and your money.
    1. Dmitry Pinchuk
      #2 Dmitry Pinchuk Guests 20 March 2021 18:45
      0
      “One weak 18650” from the laptop battery assembly has a capacity of 2200mA. With a recommended charge current of 1-1.5C, the TP4056 copes with it quite well.