Portable USB desk fan
Portable USB desk fan
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🔋 Mini Power Bank Made by Ahmed – 4000mAh DIY Project
🔋 Mini Power Bank Made by Ahmed – 4000mAh DIY Project Power banks are essential in today's mobile world, but building your own adds a creative and personal touch! Here's a story and step-by-step guide on how Ahmed built a 4000mAh mini power bank using basic electronic parts. 🧒 Creator's Intro Ahmed , a young DIY electronics enthusiast from Pakistan, decided to make a mini, portable power bank for his phone — compact, rechargeable, and pocket-friendly . ⚙️ What He Used Component Specs / Notes 18650 Li-ion Cells 2 × 2000mAh cells (total 4000mAh) TP4056 Charging Module With protection circuit Boost Converter 5V output for USB charging USB female port For connecting charging cable On/Off switch For safety and power control Small plastic casing From old power bank or DIY box Wires + hot glue For connections and fitting 🔧 How He Made It – Step-by-Step ✅ Step 1: Assembling Batteries He connected two 18650 cells in parallel for a combined 3.7V 4000mAh output ...