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Lipo 18650 to LR20 Battery adapter
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This adapter allows using 3x18650 lipo battery instead of 5xLR20 batteries.
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Model information
- Source
- Printables
- Category
- Other Gadgets
- License
- Creative Commons — Attribution
It use a buck converter to regulate the voltage from 11.4v to 7.5v. You can use washers as connectors at the battery ends.
I recommend that you use some switch or connector that you can disconnect to power off the buck converter or it will be powered even if you are not using the device.