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Enclosures & cases
Battery pack case for three AA cells with switch
A compact holder for three AA cells side by side, with a slot for a standard 19 x 13 mm slide switch and a wire exit, giving a 4.5 V supply for LED strips, small motors or a breadboard project. Each bay is 14.8 mm wide and 51 mm long with pockets at each end for spring and flat contacts, separated by 1.2 mm ribs. The lid slides on with a dovetail and a 3 mm hole routes the leads. Walls are 1.8 mm and the pack prints without supports. Open the ready-made model free, resize it on your phone or computer, then download a print-ready STL, 3MF or G-code sliced for your printer, free.Opening the ready-made model and downloading it as STL or 3MF are free, no card; AI changes use credits, from Maker at $7.99 a month.No printer? We print this part and ship it to your door. See its priceUpdated
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Adjust
Change its numbers in the viewer for free, or ask the AI in the chat: wall thickness, hole size, the thing it clips onto. AI changes use 2 credits per request (1 for a quick edit, 3 for a redesign), paid with a plan from Maker at $7.99 a month.3Print
Download a watertight STL or 3MF free, with your numbers and hand edits, or G-code sliced for your printer at the same price. After an AI change the download is included in every plan (4 credits without one).
Dimensions of the ready-made model (editable)
| Parameter | Value |
|---|---|
| width of one AA bay | 14.8 mm |
| length of bay (battery length) | 51 mm |
| rib thickness between bays | 1.2 mm |
| outer wall thickness | 1.8 mm |
| overall box height | 18 mm |
| floor thickness | 1.5 mm |
| contact pocket depth at each end | 6 mm |
| slide switch cutout width | 19 mm |
| slide switch cutout height | 13 mm |
| fraction along front wall length for switch center | 0.5 mm |
| wire exit hole diameter | 3 mm |
| dovetail groove top width | 4 mm |
| dovetail groove bottom width (narrower, undercut) | 2.5 mm |
| dovetail groove depth | 2 mm |
Example prompt
Design a battery holder for three AA cells side by side. Bays 14.8 mm wide, 51 mm long, 1.2 mm ribs, contact pockets 6 mm deep at each end, 1.8 mm walls. Cut-out for a 19x13 mm slide switch, 3 mm wire exit on one end, sliding dovetail lid.
Fit notes
With SpeakCAD you set the cell count and type, choose the switch footprint you actually own and place the wire exit where the project needs it. Preview in your browser and add a belt clip, a mounting tab or 18650 bays instead by continuing the chat.
Questions people ask about a battery pack case for three AA cells with switch
A compact holder for three AA cells side by side, with a slot for a standard 19 x 13 mm slide switch and a wire exit, giving a 4.5 V supply for LED strips, small motors or a breadboard project. Each bay is 14.8 mm wide and 51 mm long with pockets at each end for spring and flat contacts, separated by 1.2 mm ribs. The lid slides on with a dovetail and a 3 mm hole routes the leads. Walls are 1.8 mm and the pack prints without supports.
Click Open it free on this page and create a free account (no card): the ready-made model opens in your browser, on your phone or computer, nothing to install. Change its numbers in the viewer for free and download a watertight STL or 3MF free, or G-code sliced for your printer at the same price. An AI change in the chat uses 2 credits per request (3 for a redesign), and the download after it is included in every plan (4 credits without one). Start with Maker: 50 credits a month for $7.99, cancel anytime.
On this page: open the ready-made model free in a SpeakCAD account (no card), change any dimension in the viewer, then download the STL or 3MF free, or G-code sliced for your printer at the same price.
A shared STL is modelled for someone else's measurements. Here you open the ready-made model free, change it to your measurements in the viewer, then download a file sized for the part you actually own, free as STL or 3MF.
Yes. SpeakCAD slices the part on its servers with OrcaSlicer and your printer's official profile (380+ printers, including Bambu Lab, Prusa, Creality and Elegoo), and you download the G-code (a sliced .gcode.3mf for Bambu Lab printers). G-code sliced for your printer costs the same as the STL: included in every plan, free for a part you shaped by hand, 4 credits without a plan for a part with AI work in it. Pick your printer on the printers page to see its profile.
No. SpeakCAD runs in the browser on your phone or computer: the chat, the 3D engine and the live viewer load in the tab. The only file you download is the finished STL, 3MF or sliced G-code.
Print it your way
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