Testing & Troubleshooting Your Power Bank

By

 Testing & Troubleshooting Your Power Bank



Use a multimeter to check voltage and output current. Identify common issues like unbalanced cells, bad solder joints, or non-functioning USB ports.






AliExpress
Prices, deals and availability shown in this email reflect offers at send time and are subject to change. Please note that shipping fees are not included. Visit the product page for the latest info.
Download to get app-only deals
 

AliExpress Service Center
Alibaba.com Singapore E-Commerce Private Limited,
c/o 26/F Tower One, Times Square, 1 Matheson Street, Causeway Bay, Hong Kong

Comments

Post a Comment

Popular Posts

🔊💡 DIY Sound-Activated LED Bulb on 220V – Clap to Turn On!

By
Image
  🔊💡 DIY Sound-Activated LED Bulb on 220V – Clap to Turn On! Want your bulb to turn ON automatically with sound , like a clap or a snap? A sound sensor-based LED bulb on 220V can do exactly that! This project combines sound detection and AC lighting —great for automation, fun, and convenience. 🎯 What Is It? A sound-activated LED bulb lights up when it detects sound above a certain level (like a clap). It uses a microphone , amplifier, and a trigger circuit to switch a relay or triac , allowing 220V to flow to the LED bulb. 🔧 Required Components Component Description Electret Microphone Detects sound Transistor (BC547/548) Amplifies sound signal LM393 / Op-Amp / 555 Sound trigger stage Relay (5V or 12V) Controls 220V AC 220V LED Bulb Output load Power supply (5V/12V) To run the control circuit Diode 1N4007 x 4 Bridge rectifier Capacitors & Resistors Biasing and filtering Triac BT136 (optional) If not using relay Opto-isolator (optional) For safer AC switching ⚙️ H...
Read more

🌀 DIY Mini Ceiling Fan – Cool Air in Compact Style!

By
Image
  🌀 DIY Mini Ceiling Fan – Cool Air in Compact Stylen Looking to make a small fan that hangs like a ceiling fan? This DIY mini ceiling fan is ideal for study tables, camping tents, small rooms, or even battery-powered cooling setups. Easy to build, energy-efficient, and budget-friendly! 🧾 Components Required Component Purpose 775/795 DC Motor (6V–12V) Main motor for rotation Fan Blades (Plastic/3D printed) Air circulation Ceiling Mount Hook To hang the fan Power Supply (12V adapter or battery) Power source On/Off Switch (optional) Manual control Wires & Connectors Circuit connection Small Pipe or Rod Mounting shaft ⚙️ How It Works The motor rotates the blades at moderate speed. The fan is mounted overhead like a small ceiling fan. You can power it via battery, adapter, or solar (for outdoor use). 🔌 Basic Circuit css Copy Edit [Power Supply] → [Switch] → [Motor] → [Fan Blades] Use a voltage regulator (like LM317) if you want speed control. ✅ Fea...
Read more

🔦🎵 DIY Mini Emergency Light with Bluetooth Speaker

By
Image
  🔦🎵 DIY Mini Emergency Light with Bluetooth Speaker Why not enjoy light and music during a power outage? This DIY combo device combines a mini emergency LED light with a Bluetooth speaker , making it perfect for blackouts, camping, or travel. 🧾 Components Required Component Purpose 3.7V 18650 Battery Power source TP4056 Charging Module Battery charging & protection Boost Converter (5V) Step up voltage for circuit Bright White LEDs (3–5) Emergency lighting Resistor (100–220 ohm) For LEDs Bluetooth Audio Module (e.g., MH-M18 or XS3868) Wireless music Small Speaker (3W–5W) Audio output On/Off Switch Power control USB Cable / Port Charging input Small Enclosure Box Final body casing ⚙️ Circuit Overview Lighting Section : Battery → Boost Converter (5V) → Switch → Resistor → LEDs Audio Section : Battery → Bluetooth Module → Speaker You can power both sections from the same boosted 5V line . ✅ Features Bright LED emergency light Bluetooth audio up to 1...
Read more

🔋 Making a Lighter That Runs on Battery Instead of a Matchbox

By
Image
  🔋 Making a Lighter by Ahmad That Runs on Battery Instead of a Matchbox Ever thought about creating your own battery-powered lighter ? Let’s replace the traditional matchbox with a rechargeable solution! 📦 Materials Needed: AA Battery (or 18650 Li-ion battery for more power) Battery holder Metal wire (nichrome wire works best) Switch Electrical tape Small plastic or metal casing (like an old pen or casing) Soldering iron and wire ⚙️ Steps to Build: Prepare the casing : Use a small plastic tube (like an old pen or any sturdy small casing) to hold the battery. Wire the battery holder : Attach the battery to the holder and make sure it fits snugly. Attach nichrome wire : Cut a small piece of nichrome wire and fix it at one end of the casing. Add a switch : Solder the switch in the circuit to control when the nichrome wire heats up. Wire the nichrome wire to the battery : Make sure the wire will get heated when the circuit is closed by th...
Read more