How to Make a Portable Cellphone Battery Charger: Easy DIY Tutorial with Steps and Pictures
Make a portable cellphone battery charger with easy materials. Start with 18650 rechargeable batteries, a step-down voltage regulator, and a female USB connector. You can build a DIY power bank without soldering. Optionally, include a DC/DC converter for better voltage control. Stay charged wherever you go! After securing the board, attach the USB output port … Read more