3D print a case for the updated Micro Lipo Charger V2!

This features 5V input for charging single Lithium Ion/Lithium Polymer batteries. And it ships with a free JST cable.

The new V2 version features a built-in slide switch so you can easily switch between the two charging rates.

3D print the two halves in your favorite filament. Use translucent PLA to make it look like those clear enclosures from the 90’s.

The JST connectors are covered to help keep out any dust and to provide a bit of protection.

Rate switch

Flip the slide switch to chose between High or Low charge rates.

Check out this guide for more about selecting the right charge rate for your battery!

The PCB has pads for USB so you can plug it directly into anything with a USB type A socket.

It features charging status LEDs so you'll know when your battery is fully charged.

Protective Case


The PCB sits over the bottom half and the top snap-fits over the sides.

The case features a cutout for the built-in slide switch so you can still access it to adjust the charging rate.

This supports all of the Adafruit lipo batteries so you can safely swap between the different types.

For all the technical details, be sure to check out the product learn guide.


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Parts List

STL files for 3D printing are oriented to print "as-is" on FDM style machines. Parts are designed to 3D print without any support material. Original design source may be downloaded using the link below.

Slice with settings for PLA material. 

The parts were sliced using CURA using the slice settings below.

  • PLA filament 220c extruder
  • 0.2 layer height
  • 10% gyroid infill
  • 60mm/s print speed
  • 60c heated bed



Align the PCB board over the printed plate. The small wall is positioned next to the JST port. 

The top part of the case is placed over the JST port. Align the nubs on each side of the case.

The nubs on the plate are aligned to the snaps on the top case. Press fit one side at at time to snap together. 



The case features a cutout for the built-in slide switch so you can still access the charging rate.

The JST connectors are covered to help keep out any dust to provide a bit of protection.



For use with Adafruit LiPoly/LiIon batteries only! Other batteries may have different voltage, chemistry, polarity or pinout.


Remember to move the slide switch on the top over to "High / 500mA" mode, for when charging batteries with 500mAh size or larger.

This guide was first published on Nov 30, 2022. It was last updated on Mar 08, 2024.