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LR20, Size D, Battery convertor to 18650

LR20, Size D, Battery convertor to 18650

thingiverse

With this adaptor, you can replacer 3 pcs x LR20 / Size D in series batteries with18650 LiOn cells. Between the battery holder and bottom cover, you have room for electrical connection wires. based on your application you can have at least the next configuration: 1. series 2. parallel 3. parallel + TP4065 (charger and under-voltage protection)

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