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.

Parts

Top view of Adafruit Micro Lipo - USB LiIon/LiPoly charger - v1 above a 2-pin JST cable.
Oh so adorable, this is the tiniest little lipo charger, so handy you can keep it any project box! Its also easy to use. Simply plug in the gold plated contacts into any USB port and a...
$5.95
In Stock
USB Type A Extension Cable
This handy USB extension cable will make it easy for you to extend your USB cable when it won't reach. The connectors are gold plated for years of reliability. We use these handy...
$6.95
In Stock
Short USB Extender Cable with Switch in center
Add a power switch to any USB-powered project simply by plugging this between the USB power port and the USB cable. This is the most useful thing you never knew you needed! You'll...
$2.95
In Stock
Lithium Ion Battery Pack with three round cells 3.7V 6600mAh with JST PH connector
Need a massive battery for your project? This lithium-ion pack is made of 3 balanced 2200mAh cells for a total of 6600mA capacity! The cells are connected in parallel and spot-welded...
Out of Stock
Lithium Ion Polymer Battery 3.7v 420mAh with JST 2-PH connector and short cable
Lithium-ion polymer (also known as 'lipo' or 'lipoly') batteries are thin, light, and powerful. The output ranges from 4.2V when completely charged to 3.7V. This...
Out of Stock

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

Place

 

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. 

Snap

 

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.

Charge

 

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.