How To Test A Charger With A Multimeter. This number indicates how many volts of DC power the charger is putting out. Turn the battery charger on and check for any power getting in.
Test the 5V1A mobile phone charger with 5W power. So get yourself a digital multimeter with an auto-ranging function. Set the device to read DC direct current voltage.
This can be done by looking if it is polarized or grounded.
Your laptop charger has two parts. Hopefully I did this right. The concept is the same wherever you measure DC voltage. Also bring in the battery you want to test.
