Curt von Badinski
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Eli, Red has their backpack and quickplate batttery that use the same mounting holes as we do. Since there is no limitation noted on their product page for 5lb batteries then I'd expect that you will have no problems with 5lb batteries on our plate.
Generally screws are stronger in shear than in tension so in the worst case scenario here is a quick calculation: 5 pounds / 4 bolts = 1.25 pounds tensile load per screw. In ideal situations M4 fasteners can withstand upwards of several hundred pounds in tension so I think you will be OK.
Generally screws are stronger in shear than in tension so in the worst case scenario here is a quick calculation: 5 pounds / 4 bolts = 1.25 pounds tensile load per screw. In ideal situations M4 fasteners can withstand upwards of several hundred pounds in tension so I think you will be OK.