Compact Makita BL1830 21700 Battery 18V 5Ah 90Amps, Designed for high heat, high amperage, and sub compact.
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PLA from £6 inc. UK delivery on letter-sized prints. We slice, print on a calibrated Creality K2 / Bambu A1, QC and post.
This is a 5Ah battery the same approx size as a BL1830, 3mm wider, 2mm taller and 100gm heavier. This will fit in every Makita tool made for 18V platform and also other brand power tools via adapter. Used two brands of 5Ah cells Reliance RS50 70A and Tenpower 50XG 90A (140A pulse) both have 75-80C cut off and it gets up near 50C in the summer. So extra heat dissipation was added, .2mm thermal tape, 1mm thermal pad, and thermal grease, used .2mm copper tabs. Metal zip ties (screws always fail with FDM thin walls ) (dial up the tension all the way on the metal band tool) a flexible spacer 85A (or lower) is used to use between the case and top. To compensate for the unevenness of FDM printed parts. I used a 20W fiber laser to cut the copper, fish tape, and to mark the batteries. Used Polymaker HT-PLA for button, and BMS mount and HT-PLA-GF for case. 85A TPU for spacer. Spring .8x8x15, M3 self threading 5-8mm long, 22AWG wire, Battery meters, and BMS PCB for ali express around 3$ a piece. The battery meter can be soldered on to PCB first then fed through the battery case, then secured with some RTV, Screen shots include laser marking settings and fonts used. Let me know if you need more details.
