How to make a power bank with a flashlight from a syringe and a battery

Most Chinese power banks do not reach the declared capacity. In this regard, it is more profitable to buy a high-quality battery and make a Power BANK from it. It will definitely have the declared capacity, and is guaranteed not to let you down.
How to make a power bank with a flashlight from a syringe and a battery

Materials:


  • syringe 25 cc;
    syringe

  • rechargeable battery 18650 3100 mAh -
    rechargeable battery 18650 3100

  • module for power bank with LED.
    module for power bank

    module for power bank with LED


Power bank manufacturing process


A syringe will be used as the body of the power bank. The volume scale on it can be washed off with a solvent. For further work, its nose is cut off.
The volume scale on it can be washed off with solvent

The power bank module is soldered to the battery.
The power bank module is soldered to the battery

To keep everything compact, you should use short wires. One, according to the module diagram, is soldered to the positive terminal of the battery, and the second on the side to the negative terminal through cut insulation.
A power bank module with an LED is soldered to the battery

Windows for connectors and power buttons are cut into the syringe body.
The syringe body is cut to length

Windows are cut into the syringe body

Then the module with the battery is placed inside. A pusher is made from the nose of the syringe to press the button, since it is located deep in the body out of reach.
A pusher is made from the nose of the syringe

The module with the battery is placed inside and the pusher is inserted

The open end of the syringe body is filled with hot melt adhesive.
The open end of the syringe body is filled with hot melt adhesive.

The entire power bank is ready for use.
power bank is ready to use

Thanks to the availability LED on the module it can also be used as a flashlight.
The power bank can be used as a flashlight

Watch the video


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Comments (3)
  1. Konstantin Shendalev
    #1 Konstantin Shendalev Guests 1 February 2021 14:37
    3
    Can I have a link to the module?
  2. Alexei
    #2 Alexei Guests 1 February 2021 19:25
    0
    And what can they charge? Perhaps a headset. Well, or grandma’s phone, which already works for up to a month without recharging. But for a modern smartphone with a battery of 3...4 a/h it’s not enough.
  3. Sergey
    #3 Sergey Guests 1 February 2021 20:30
    1
    I couldn’t find such a module on Ali, can anyone give me a link???