Test both the charger and batttery with a volt meter. You can test the charger even while it's operating. It's voltage output should match what is printed on the information label. You can do the same test with the battery. You can test it before, during and after charging it. Make sure it's output matches the stated output on the label.
Answers & Comments
Test both the charger and batttery with a volt meter. You can test the charger even while it's operating. It's voltage output should match what is printed on the information label. You can do the same test with the battery. You can test it before, during and after charging it. Make sure it's output matches the stated output on the label.