To verify the performance of mobile phone chargers, the following points need to be confirmed first:
1. Does the charger match the phone? Different models of phones may require different specifications of chargers, and using mismatched chargers may result in slower charging speed or battery damage.
2. Whether the charger is working properly: You can determine whether the charger is working properly by inserting it and observing whether the indicator light is on.
3. Check if the charging cable is damaged: Check if the charging cable is broken, if the connector is loose, and if the plug is deformed, all of which may affect the performance of the charger.
Once the above points are confirmed to be correct, the following are several testing methods:
1. Measure output current: Use a small tool called a "USB ammeter" and plug it into the connection between the charging cable and the phone to measure the current transmitted by the charger to the phone. Normally, the output current of a mobile phone can reach 1 to 2A.
2. Time test: Connect the phone to the charger and start charging. Then measure the increase in battery power of the phone after a certain period of charging with the charger, and divide it by time to obtain the charging speed of the phone.
3. Charging protection test: Use a testing instrument to test whether the charger can automatically power off under overvoltage, overcurrent, or short circuit conditions, in order to verify its charging protection function.
Overall, by testing in the above ways, it is possible to determine whether the performance of the mobile phone charger is normal. To ensure safety, it is recommended to choose a legitimate brand charger and not use cheap chargers without a clear brand.
