Salt-water battery
A work-in-progress design for a 12 V battery built from replaceable aqueous zinc-manganese dioxide (Zn-MnO₂) cells, with a mild salt electrolyte instead of acid. The first step is a single test cell to measure what the chemistry really delivers.
Plans and drawings
- Cell module blueprints
Full drawing set, bill of materials and the 15-step build sequence for one cell module.
- Coupon test rig wiring
Wiring for the small coupon test rig used to compare materials before building a full cell.
- Build plan: first test cell
Step-by-step plan for building and testing the first cell module: safety, ordering, coupon tests, formation and the go/no-go decision.
- Parts sources
Where to buy each material, with prices found in October 2026.
- Cell module blueprints (PDF)
The blueprint set as a printable PDF.
Blueprints
3D models
Test rig wiring
Files for builders
3D-printable parts (STL) 16
- cell_case_1s1p_box.stl
- cell_case_1s1p_lid.stl
- cell_case_1s2p_box.stl
- cell_case_1s2p_lid.stl
- cell_case_2s1p_box.stl
- cell_case_2s1p_lid.stl
- cell_case_2s2p_box.stl
- cell_case_2s2p_lid.stl
- cell_case_fit_test.stl
- coupon_box.stl
- coupon_clamp_plate.stl
- coupon_die_base.stl
- coupon_die_frame.stl
- coupon_die_punch.stl
- coupon_lid.stl
- coupon_notch_shim.stl