Compact / COLDCARD Mk
HARDCASE
The smaller water-resistant case uses custom-cut foam around the compact COLDCARD Mk form factor.
Exterior size4.5 × 3.25 × 1 in
ExteriorBlack / unbranded
Low-profile protection for COLDCARD
Protect the device. Keep the profile low.
Water-resistant black hard cases with custom-cut foam for COLDCARD Mk and Q. Built for storage, travel, and ordinary handling without advertising what is inside.
Water-resistant
Custom-cut foam
Unbranded exterior
Purpose-built, not repurposed
A hard case that fits what you actually carry.
Loose devices get knocked around. Generic cases waste space. HARDCASE uses protective foam cut for the COLDCARD form factor, inside a plain black shell that stays deliberately low-key.
01Water-resistantUseful protection from everyday splashes and exposure. Not waterproof.
02Protective foamCustom-cut interiors hold the intended device instead of letting it rattle.
03No exterior brandingA simple black case does not announce what you are carrying.
04Two practical sizesCompact for COLDCARD Mk, larger for Q and its battery supply.
Choose the right fit
One purpose. Two sizes.
Pick the compact case for the COLDCARD Mk form factor or the larger Q case for the device, batteries, and more room.
Roomier / COLDCARD Q
Q HARDCASE
The larger case fits COLDCARD Q and three batteries. It can also fit Q and Mk5 snugly when the Q position is inverted.
Exterior size7.25 × 1.75 × 5.5 in
Standard fitQ + 3 batteries
Why a custom case?
Protection without the tactical theatre.
HARDCASE is intentionally simple: a durable black exterior, fitted foam, and enough room for the device it was made to hold.
- 01Keep a device from moving around inside the case.
- 02Add everyday protection without a conspicuous logo.
- 03Use only the space required for the setup you carry.
Open. Closed. Nothing hidden.
See the case and the fit before you choose.
Straight answers
HARDCASE FAQ
Which HARDCASE fits my COLDCARD?
Choose the compact HARDCASE for the COLDCARD Mk form factor. Choose Q HARDCASE for COLDCARD Q, three batteries, and more interior room.
Is HARDCASE waterproof?
No. HARDCASE is water-resistant, not waterproof. Do not submerge it or treat it as protection against every environment.
What fits inside Q HARDCASE?
Q HARDCASE fits a COLDCARD Q and three batteries. A Q and Mk5 can fit snugly when the Q position is inverted.
Are the COLDCARD and batteries included?
No. COLDCARD devices and batteries shown in photographs are not included with either case.
Does a hard case replace secure backups?
No. Protect the wallet itself, but maintain independent backups appropriate to your setup. A case cannot recover a lost seed or stop someone who already has physical access and the required credentials.
Choose the correct fit
Compact for Mk. More room for Q.
Both use a plain black exterior, protective foam, and a water-resistant shell. COLDCARD devices and batteries are sold separately.
