Power Bank 18650
thingiverse
This is an incredibly straightforward power bank design. To bring this concept to life, you'll need these essential components: (1) TP4056 - A lithium-ion charger with built-in load protection. (2) 3.7V boost module that converts the voltage to 5V. Additionally, you may want to have a glue gun on hand to secure the components in place. Take a close look at the diagram for more detailed instructions. This design is remarkably simple yet incredibly useful.
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