device really fast and the other 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 Wear
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 read also the FAQ: http://goo.gl/R8XgXX
—-
Start the app 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 many things:
– Charger (USB/AC/Wireless)
– USB cable
– Phone type
– Current tasks running
– Display brightness
– WiFi state
– GPS state
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.
—-
Background info: The app measures the charging/discharging
current of the battery. If your phone 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 phone and the remaining power will be charged into the
battery.
If your phone 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 info: 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 system provides unstable values. Every
company uses different battery types and other hardware making it
difficult to get accurate results about your charger.
—-
LiPo batteries don’t draw the maximum for the full time it takes to
charge the phone. 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 Tutorial:
http://youtu.be/A6mKd5_-abk
—-
Phones/ROMS compatible only with “Old measurement method” switched
on and selected the right “Measurement interface”:
➤ HTC One M7 / M8
➤ LG G3
Phones/ROMS reported to be not working with this app:
➤ 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 phone is one of the
above. Not the app is wrong but your phone does not support this
kind of measurement yet.
If the app doesn’t work on your device with pre-Lollipop Android
version then please read the first and the second posts in this XDA
developer forum thread: http://goo.gl/pZqJg8 . Please post your
problem with screenshots in the XDA thread.
Please read also the FAQ: http://goo.gl/R8XgXX