Tutorial: Modding 4 x 7.4v 18650 Lithium Ion Battery w/Barrel Wire & 8.4v Charger

This video tutorial demonstrates how to modify a 3000 mAh 7.4 Volt lithium battery to power an Arduino Uno R3 board using barrel wires. It also covers creating an 8.4 Volt AC/DC adapter to recharge the battery. The tutorial emphasizes safety precautions when handling lithium batteries and provides a detailed list of materials needed. The process involves stripping wires, connecting components, and securing them with insulation tape. The video concludes with testing the modified battery and charger to ensure functionality.

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