Did you ever felt, that one Charger/USB cable set charges your device really fast and the other not? Now, you can prove this with Ampere. Measure the charging and discharging current of your battery. Widgets and notification are PRO features. The app works on Android 4.0.3+ devices. Not every device is supported because there are devices which lacks an appropriate measurement chip (or the interface) and they can not be supported at all. Please read the list of not supported phones at the end of the description. The app is not meant to be mA accurate. It is only good for evaluate which Charger/USB cable combo is working the best for you on the same device. Please don’t use the readings on this app as concrete science. However, the readings are good enough to relatively measure how various chargers and USB cables fair on the same device. If the app shows 0mA all the time, please use the settings option “Old measurement method”. You can force the app with it to use the old measurement interface, if the Lollipop device has at least one. Unfortunately some Samsung devices don’t give correct (measured) values (e.g.: S5), just the maximum possible charging current with the actual USB cable/charger configuration. This is a firmware problem.
Ampere is the perfect app for you on your android smartphone if you are really curious to know what the differences are between two of your different phone chargers for your android device.
Download and install Ampere app on your Android smartphone
You can download the great Ampere app on your android smartphone for free from here and learn what are different chargers doing to your android smartphone when charging it.