[APP][5.0+] Ampere the charging meter


Senior Member
Jan 7, 2007

Measure the charging and discharging current of your battery.

The app was at first designed for Lollipop only, but now devices with Android 4.0.3+ are also supported. Please read the pre Lollipop forum..

How to use the app: 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:
  • The charger (USB/AC/Wiereless)
  • The USB cable
  • The phone type
  • Current tasks running
  • Display brightness
With this app you can for example search for an optimal charger/USB cable combo.

The app is not meant to be mA accurate. It is only good for evaluate which Charger/USB cable combo is good for you.

Background info: The app measures the battery charging/discharging current. If your phone is not connected to a charger, you see the discharging current which is negative. Now, 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, then a 500 mA charger will charge your battery maximum with 200 mA current.

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 just zero which means, that the Android system provides such unstable values. Some phones, like the Nexus 4 reports such unstable wide spreading readings when charged with a low current charger (e.g. 500mA), that even the average value is just a joke.

Background info about batteries and how they will be charged: 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.

If your Lollipop device (or later) shows 0 all the time: There are Lollipop devices which don't have a working power profile (the new Lollipop interface to get the measured current). But on some of them is the old interface still present and maybe also working. Please use the settings option "Old measurement method" in this case. You can force the app with it to use the old interface, if the Lollipop device has at least one. Maybe it helps...

If the app doesn't support your device, you can collect some info to help. Please read this post in this case.

Phones/ROMS reported to be working with this app:
  • Motorola Atrix HD/CM 5.0.2 (MB886 JBBL)
  • Moto E (condor_umtsds)
  • Moto G 2013 XT1033 (Dual Sim)/Factory
  • Moto G 2014 (2nd gen)/Factory 5.0.2
  • Moto X 2014 (victara)
  • Nexus 4/Factory 5.0.1 (unstable values by low charging currents)
  • Nexus 5/Factory 5.0.2
  • Nexus 6
  • Nexus 7 2012 (unstable values by low charging currents)
  • Nexus 7 2013/Factory 5.0.2 (no discharging current -> Bug reported)
  • Nexus 9 (flounder)
  • Nook HD (hummingbird running cm12)
  • OnePlus One (A0001)
  • Samsung Galaxy Star (mint)
  • Samsung Galaxy Note 2 (GT-N7100 with RR Rom)
  • Samsung Galaxy Note 3 (N9005 )/LOLLIPOP Rom 5.0
  • Samsung Galaxy Note 3 (SM-900W8)
  • Samsung Galaxy Note3 (hlte, hltexx)
  • Samsung Galaxy Note 10.1 (SM-P600 running CM12LP_5.0.2)
  • Samsung Galaxy S3 (not accurate)
  • Samsung Galaxy S3 (m0 , i9300, CM12 charging only)
  • Samsung Galaxy S4 (Google Play Edition, jfltexx)
  • Samsung Galaxy S4 (ja3g)
  • Samsung Galaxy S5 (klte, kltevzw)
  • Samsung Galaxy Tab 7.0 Plus GT P6200
  • Samsung Galaxy Tab 10.1 Pro T520 Picassowifi
  • Samsung Galaxy Tab S 10.5 (chagallwifi)
  • Sony Xperia M (C1905 running CM12)
  • Sony Xperia Z C6602 (with aosp lollipop)
  • Sony Xperia Z Ultra (togari)
  • ZTE Blade S6 (P839F30)

Phones/ROMS reported not to be working with this app:
  • GOOGLE Galaxy Nexus– toro
  • HTC Desire 510– htc_a11ul8x26
  • HTC One S– ville
  • HTC One X– endeavoru
  • HTC One XL– evita
  • HTCSensation 4G– pyramid
  • Lenovo P2– P2a42
  • Lenovo TAB S8-50F– S8-50F
  • Lenovo YOGA Tablet Pro-1050L/Yoga Tablet 2– YT2
  • LG G Pad 8.3 LTE– altev
  • NVIDIA TegraNote– tegranote
  • NVIDIA TegraNote– tegranote7c
  • PEGATRON P66– P66
  • SAMSUNG Galaxy A3– a3lte
  • SAMSUNG Galaxy A3– a3ulte
  • SAMSUNG Galaxy A5– a53g
  • SAMSUNG Galaxy A5– a5lte
  • SAMSUNG Galaxy A5– a5ltechn
  • SAMSUNG Galaxy A5– a5ltectc
  • SAMSUNG Galaxy A5– a5ltezh
  • SAMSUNG Galaxy A5– a5ltezt
  • SAMSUNG Galaxy A5– a5ulte
  • SAMSUNG Galaxy A5– a5ultebmc
  • SAMSUNG Galaxy A5– a5ultektt
  • SAMSUNG Galaxy A5– a5ultelgt
  • SAMSUNG Galaxy A5– a5ulteskt
  • SAMSUNG Galaxy A7– a7lte
  • SAMSUNG Galaxy A7– a7ltechn
  • SAMSUNG Galaxy A7– a7ltectc
  • SAMSUNG Galaxy A7– a7ltektt
  • SAMSUNG Galaxy A7– a7ltelgt
  • SAMSUNG Galaxy A7– a7lteskt
  • SAMSUNG Galaxy Ace Style– heatqlte
  • SAMSUNG Galaxy Ace– heatlte
  • SAMSUNG Galaxy Core– arubaslimss
  • SAMSUNG Galaxy Fame Lite Duos– nevisw
  • SAMSUNG Galaxy Fame– nevis
  • SAMSUNG Galaxy Fame– nevis3g
  • SAMSUNG Galaxy Fame– nevis3gcmcc
  • SAMSUNG Galaxy Fame– nevisds
  • SAMSUNG Galaxy Fame– nevisnvess
  • SAMSUNG Galaxy Fame– nevisp
  • SAMSUNG Galaxy Fame– nevisvess
  • SAMSUNG Galaxy Grand Neo– baffinlite
  • SAMSUNG Galaxy Grand Neo– baffinlitedtv
  • SAMSUNG Galaxy Grand Prime– fortuna3g
  • SAMSUNG Galaxy Grand Prime– fortuna3gdtv
  • SAMSUNG Galaxy Grand Prime– fortunalte
  • SAMSUNG Galaxy Grand Prime– fortunaltectc
  • SAMSUNG Galaxy Grand Prime– fortunaltezh
  • SAMSUNG Galaxy Grand Prime– fortunaltezt
  • SAMSUNG Galaxy Nexus– maguro
  • SAMSUNG Galaxy Nexus– toroplus
  • SAMSUNG Galaxy Note2– t03g
  • SAMSUNG Galaxy Note2– t03gchn
  • SAMSUNG Galaxy Note2– t03gchnduos
  • SAMSUNG Galaxy Note2– t03gcmcc
  • SAMSUNG Galaxy Note2– t03gctc
  • SAMSUNG Galaxy Note2– t03gcuduos
  • SAMSUNG Galaxy Note3– ha3g
  • SAMSUNG Galaxy S Duos2– kyleprods
  • SAMSUNG Galaxy S2– GT-I9100
  • SAMSUNG Galaxy S3 Slim– wilcoxds
  • SAMSUNG Galaxy S3– d2att
  • SAMSUNG Galaxy S3– d2can
  • SAMSUNG Galaxy S3– d2dcm
  • SAMSUNG Galaxy S3– d2ltetmo
  • SAMSUNG Galaxy S3– d2spr
  • SAMSUNG Galaxy S3– d2tfnvzw
  • SAMSUNG Galaxy S3– d2vmu
  • SAMSUNG Galaxy S3– d2vzw
  • SAMSUNG Galaxy S5 mini– kminilte
  • SAMSUNG Galaxy S5 mini– kminilteatt
  • SAMSUNG Galaxy S5 Mini– kminilteusc
  • SAMSUNG Galaxy S5 Neo– s5neolte
  • SAMSUNG Galaxy S5 Neo– s5neoltecan
  • SAMSUNG Galaxy Star Plus– logan2g
  • SAMSUNG Galaxy Tab4 7.0– degas3g
  • SAMSUNG Galaxy Tab4 7.0– degaswifi
  • SAMSUNG Galaxy Trend Plus– kylepro
  • SAMSUNG Galaxy Win Duos– delos3gchn
  • SAMSUNG Galaxy Win Pro– wilcox3g
  • SAMSUNG Galaxy Win Pro– wilcoxctc
  • SAMSUNG Galaxy Win– delos3gcmcc
  • SAMSUNG Galaxy Win– delos3gduosctc
  • SAMSUNG Galaxy Win– delos3geur
  • SAMSUNG Galaxy win– delos3gss
  • SAMSUNG Galaxy Win– delosltelgt
  • SAMSUNG Galaxy Win– deloslteskt
  • UNKNOWN Primo_EF2
  • XIAOMI HM Note 2– hermes

Please report your experience with your phone/ROM type.

If a device has an erroneous or dummy implementation of the Power Profiles for Android, then the app will never support it or the app will just show the erroneous or dummy values delivered on the interface. Please ask your ROM developer to implement it correctly.

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  • Portuguese (Brazil)
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  • Romanian
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  • Slovak
  • Spanish
  • Spanish (United States)
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If you would like to have the app in your language and you are willing and able to translate the app please contact me.

Ampere on Blogger
The developer on Twitter
Ampere Beta testing community on reddit
Ampere on Facebook



Last edited:


Senior Member
Jun 28, 2011
0mA :(
M7 CM12 Nightly Nuk3rn3l

EDIT: and my data transfer speed from PC to phone was barely above 0kb/s, till I killed app (from cache)?
Last edited:
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Senior Member
May 3, 2008
Any app similar to Android 4.4? :)

"Galax Charging Current" works on 4.4 and suports many Samsung Devices.

---------- Post added at 10:12 ---------- Previous post was at 10:10 ----------


Measure the charging and discharging current of your battery.

The app works only on Lollipop (Android 5.0+) devices.

Start the app and wait ca. 10 seconds ("measuring" is on the display). After this time, the charging or discharging current will be shown.
[...] [/URL]
Great Work!
Perhaps you want to consider adding a real-time widget and some tasker integration to improve your app even more! Just ideas to make your app even better.
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