Testing a Charger
Equipment Needed
- Multimeter: A tool used to measure voltage and current.
- Power Source: Ensure the charger is plugged into a power outlet.
Steps to Test a Charger
- Set Up the Multimeter:
- Set the multimeter to measure voltage (DC or AC depending on the charger type).
- Typically, you’ll use the DC setting for most electronic chargers.
- Connect the Multimeter:
- Place the positive (red) probe on the charger’s output terminal or plug.
- Place the negative (black) probe on the ground or the outer casing of the charger if it’s not insulated.
- Read the Voltage:
- Check the voltage reading on the multimeter. Make sure it matches the charger’s specified output voltage.
- For instance, a 19V laptop charger should show a reading close to 19V.
- Check for Current (Optional):
- If you want to check how much power (watts) the charger can deliver, you can also measure the current.
- Use the multimeter’s current setting and ensure it’s set to a high enough range to handle the charger’s output.
- Calculate power by multiplying volts by amps (watts = volts × amps).
- Evaluate the Results:
- If the voltage matches the charger’s specifications, it’s likely working correctly.
- If the voltage is significantly lower or zero, the charger might be faulty.
Additional Considerations
- Voltage Fluctuations: Some chargers have multiple stages or modes (like desulfation), so the voltage might fluctuate.
- Safety: Always ensure proper safety precautions when handling electrical devices and measurements.
Additional Tips
- Software Checks: For devices like MacBooks, you can check power wattage through the operating system settings, but this doesn’t directly test the charger.
- Hardware Checks: If you’re using a hub or adapter, ensure it supports pass-through charging at the desired wattage level.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/how-can-i-test-if-my-charger-is-providing-enough-power/
