Uploaded February 2017 | Updated September 2026, 1 week ago

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Here i show my DIY external battery pack
DC to DC converter $6.98
amazon.com/gp/product/B00XT0PEAO/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
5x Black Plastic 3 x 3.7V 18650 Batteries holder $9.58
amazon.com/gp/product/B00NPZ87GQ/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1