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2020 Rail Twin 18650 Jack-Screw Cradle
A bolt-on cradle for two 18.4 x 65 mm 18650 cells that mounts across 2020 extrusion with M5 T-nuts on 98 mm centres. Each cell slides nose-first under a closed hood, then an M3 jack screw with a captured nut clamps it end-to-end, so it can't rattle loose on a moving robot. The 72 mm bay also fits 65–70 mm protected cells.
Flagged: battery or DC power. Not for safety-critical use without independent engineering review.
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