4S2P 18650 Frame-Strap Battery Box
A low-profile open-top tub for a DIY 4S2P pack of eight 18650 cells (18.4 x 65 mm) laid in two layers of two, with an internal bay of 134 x 39 x 39 mm. The outside measures 144 x 44 x 45 mm. Two 22 x 3.2 mm strap tunnels run through the 6 mm floor so velcro straps hold it to a down tube or frame triangle. There's a 16 x 10 mm main-lead notch at one end, an 8 x 6 mm balance-lead notch at the other, and four M3 heat-set columns to screw on a flat lid. It's for an e-bike, scooter or robot pack you build yourself.
electronics 18650 battery-box ebike
⚠ Flagged: battery or DC power. Not for safety-critical use without independent engineering review.