Battery Cover for TI Programmer Calculator
thingiverse
I had to dive into the OpenSCAD script of the customizable battery cover I remixed this from to get it just right. It may not be perfect, but it snaps right in there, keeping the 9V battery in place - the original battery pack is lost. I think I may replace it with a rechargeable Li-Poly battery and charge/boost circuitry. The original socket is just about right for a micro-USB port. The vintage Texas Instruments Programmer calculator from 1977 has a number of calculators with the rechargeable pack in this case; this battery door should serve as a replacement for them all. Check your model and explore the links below.
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