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About the application:

Did you ever felt, that one Charger/USB cable set charges your device really quick and the another not? Now, you can prove this with Ampere. Measure the charging and discharging current of your battery. PRO features: - Widgets - Notification - Alerts on device - Alerts on Android device Wear The apk works on Android device 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 apk is not meant to be mA accurate. It is only awesome for evaluate which Charger/USB cable combo is working the best for you on the same device. ---- Please read also the FAQ: http://goo.gl/R8XgXX ---- Begin the apk and wait ca. 10 seconds ("measuring" is on the display). After this time, the charging or discharging current will be shown. The current depends on a lot of things: - Charger (USB/AC/Wireless) - USB cable - Smartphone kind - Current tasks running - Display brightness - WiFi state - GPS state Please don't use the readings on this apk as concrete science. However, the readings are awesome enough to relatively measure how different chargers and USB cables fair on the same device. If the apk shows 0mA all the time, please use the settings option "Old measurement way". You can force the apk 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. ---- Background details: The apk measures the charging/discharging current of the battery. If your smartphone is not connected to a charger, you see the discharging current which is negative. If you connect a charger then the current what the charger gives will be used to supply your smartphone and the remaining power will be charged into the battery. If your smartphone consumes 300 mA without a charger connected (-300mA on the display), then a 500 mA charger will charge your battery maximum with 200 mA current (200mA on display). ---- Technical details: The displayed current is an average value from 50 measurements minus the 10 upper values and the 10 lower values. The displayed current can be shaky or unstable or even zero which means, that the Android device system provides unstable values. Every company uses various battery types and another hardware making it difficult to receive accurate results about your charger. ---- LiPo batteries don't draw the maximum for the full time it takes to charge the smartphone. If your battery is charged almost full then the charging current will be much less as by lower battery levels. - A graph explaining LiPo charge stages: http://batteryuniversity.com/_img/content/ion1.jpg - Dave's (EEVBlog) LiPo Charging Guide: http://youtu.be/A6mKd5_-abk ---- Phones/ROMS compatible only with "Old measurement way" switched on and chosen the right "Measurement interface": ➤ HTC One M7 / M8 ➤ LG G3 Phones/ROMS reported to be not working with this apk: ➤ Galaxy Grand Prime - fortuna3gdtv ➤ Galaxy Note2 - t03g, t03gchn, t03gchnduos, t03gcmcc, t03gctc, t03gcuduos ➤ Galaxy S3 - d2att, d2spr, d2vmu ➤ Galaxy Tab4 7.0 - degas3g ➤ HTC Desire 510 - htc_a11ul8x26 ➤ HTC One S (ville), X (endeavoru), XL (evita) ➤ HTC Sensation 4G - pyramid Please do not give wrong rating, if your smartphone is one of the above. Not the apk is wrong, but your smartphone does not help this type of measurement yet. If the apk doesn't work on your device with pre-Lollipop Android device ver, then please read the first and the second posts in this XDA developer forum thread: http://goo.gl/pZqJg8 . Please post your trouble with screenshots in the XDA thread. Please read also the FAQ: http://goo.gl/R8XgXX