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Enclosures & cases
Whoop 4.0 battery pack protective travel case
A hard case for the Whoop 4.0 slide-on battery pack, the small rectangular block that is easy to crush in a gym bag, roughly 40 x 27 x 12 mm depending on revision. The pack sits in a 41 x 28 x 13 mm pocket with a foam-free friction fit, the hinged lid snaps shut with a 0.15 mm lip, and a 6 mm loop lets it hang on a key ring or bag zip. There is a 12.5 x 7 mm cut-out so the USB-C cable can charge the pack while it is inside. Walls are 1.8 mm and the case prints open side up. 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 |
|---|---|
| pocket length | 41 mm |
| pocket width | 28 mm |
| pocket depth | 13 mm |
| wall thickness | 1.8 mm |
| general internal clearance | 0.3 mm |
| snap lip clearance | 0.15 mm |
| lid cavity depth | 6 mm |
| pin radius | 3 mm |
| total knuckles (base + lid alternate) | 5 |
| outer diameter of loop | 12 mm |
| inner diameter (key ring size) | 6 mm |
| thickness (extrusion along X) | 4 mm |
Example prompt
Create a hinged travel case with a 41 x 28 x 13 mm pocket for a Whoop 4.0 battery pack, a print-in-place hinge, a snap lip with 0.15 mm clearance, a 12.5 x 7 mm USB-C cut-out on one end, a 6 mm key ring loop and 1.8 mm walls.
Fit notes
Whoop changes the pack shape between generations and a downloaded case may be for the 3.0. In SpeakCAD you type the measurements of your pack, preview the case in the browser, add a slot for a spare strap in the chat, then download the STL.
Questions people ask about a Whoop 4.0 battery pack protective travel case
A hard case for the Whoop 4.0 slide-on battery pack, the small rectangular block that is easy to crush in a gym bag, roughly 40 x 27 x 12 mm depending on revision. The pack sits in a 41 x 28 x 13 mm pocket with a foam-free friction fit, the hinged lid snaps shut with a 0.15 mm lip, and a 6 mm loop lets it hang on a key ring or bag zip. There is a 12.5 x 7 mm cut-out so the USB-C cable can charge the pack while it is inside. Walls are 1.8 mm and the case prints open side up.
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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