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  • power bank case

  • battery enclosure

  • 21700 battery holder

  • portable charger housing

  • electronics project

  • custom powerbank

  • 21700 battery case

  • portable charger enclosure

  • DIY powerbank

  • battery holder

  • electronics housing

1S 21700 Power Bank Case
Print Profile(1)
  • 0.2mm layer, 2 walls, 15% infill

    1-disc

    PLA

    Designer

1

1

7

1

Released 2026-09-01
Details
Files(1)
Makes & Comments (0)

A sleek, ultra-compact enclosure designed specifically for a single (1S) high-capacity 21700 Li-ion battery. This case is perfectly tailored to fit the popular Dual USB 5V 4.5A 22.5W Micro/Type-C charging module found on AliExpress. It is the ultimate DIY project for creating a pocket-sized, high-speed, and high-capacity portable charger.

 

Hardware Compatibility

This case has been precisely modeled around the following component specs:

  • Battery: 1x 21700 Li-ion cell (1S configuration for maximum energy density in a compact size).
  • Supported Board: 22.5W Fast Charging Module with Dual USB-A outputs, Micro-USB input, and Type-C Input/Output.
  • Protocols: Quick Charge 4.0 / 3.0, PD3.0, Huawei FCP, and more.

Design & Usability Features

  • Perfect Port Alignment: Precision cutouts for the dual USB ports, Type-C, and Micro-USB connectors.
  • Ergonomic Shape: A comfortable, semi-circular profile that fits nicely in a pocket or bag without sharp edges.
  • Easy Assembly: Designed for a snug, secure fit to keep the 21700 battery and the board firmly in place.
  • Print-Friendly Geometry: Optimized flat base ensuring excellent bed adhesion and a clean print with no supports required.

Bill of materials

  • Name
    Quantity
    Notes
  • 1
    21700 battery
    1
  • 2
    22.5W Fast Charging Module with Dual USB-A outputs, Micro-USB input, and Type-C
    1
    https://www.aliexpress.com/item/1005008592069516.html

Originality of the Model

The author declares that this work is their personally original model

This model is licensed under the following terms:

Standard Digital File License

This work is licensed under a Standard Digital File License. Digital files have a strict non-commercial, personal use only license.

You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital file or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including remixes of this object). You can not host these files on other digital platforms, web stores or cloud repositories. The objects may not be used in any way whatsoever in which you charge money, collect fees.

Models(1)

  • model file image
    Minimalist 1S 21700 Power Bank Case.3mfDesigner

    177.34 KB

    2026-08-28