AAA battery spacer
thingiverse
AAA battery spacerFor the screws, I used leftover PC equipment.Insert the screw into the tube and tighten with a screwdriver so that the tip sticks out. File the threaded part with an iron file to match the length of the AA battery.単4電池スペーサー(単4電池->単3電池として使えます)ネジはPC機材の余りものを使います筒の中からネジを入れドライバーで、先端が出るように締める。ネジ部を鉄ヤスリで削り、単3電池の長さに合わせます(ネジ全長が６mmであれば削る必要はありません。それより長いものは削る必要あり)(筒にも一応穴がありますが、ネジや印刷状態により穴を広げる必要があります)
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