Canon NB-4L battery adapter

thingiverse

To perform timelapses with my Canon Ixus 220 HS (also known as Powershot ELPH 300 HS), using the great CHDK, I discovered that the standard battery only lasts for 2.5 hours. Searching for a solution, I found Canon's offering with its significant drawback - a price tag of around 90€. Instead, I used OpenSCAD to design a battery dummy for the NB-4L battery. This dummy features a female servo connector and desoldering wick contacts that enable external power supply usage. To provide the necessary 4.0V (up to 2A) via an external source, I employed a cheap LM2596S step-down converter (found on eBay under "LM2596S"). Alternatively, you could opt for a LM317 linear regulator or any other component that delivers the required voltage. Feel free to customize this design using the OpenSCAD file. Post-processing involves slicing the STL file with your preferred slicer software, splitting the G-code into two parts, printing the first part, inserting the desoldering wick and connector, then continuing with the second part of the print.