Ampere v4.35.11

Brain_trapp ❘ Freeware ❘
Android
out of 327326 votes

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The application enables users to compare the charging speeds of different USB cables and chargers on a single device, providing valuable insights into their performance. It measures the charging and discharging current of your battery, offering a practical tool for evaluating power sources.

Recommended for users seeking to determine which charger and cable combination delivers optimal performance, though it is important to note that the measurements are approximate and should not be considered highly precise. The app's primary use is comparative rather than exact quantification.

PRO features include widgets, notifications, alerts on the device, and alerts on Android Wear, enhancing user convenience and monitoring capabilities.

Device compatibility is limited; some models lack the necessary measurement interface or chip, rendering them unsupported. Please refer to the provided list of unsupported devices at the end of the description for details.

The app is not designed to provide milliamperes accuracy but serves as a functional tool to evaluate relative performance among various chargers and cables on the same device.

Usage instructions recommend launching the app and waiting approximately 10 seconds for it to stabilize readings. The displayed current is influenced by numerous factors including charger type (USB/AC/wireless), cable quality, device hardware, background tasks, screen brightness, WiFi, and GPS status. Consequently, readings should be interpreted as indicative rather than exact.

<ul>
 <li>If continuous zero readings appear, switch to the "Old measurement method" within settings. This alternative interface can improve results on certain devices running Lollipop or newer versions.</li>
 <li>Certain Samsung devices, such as the Galaxy S5, may only display maximum possible charging current due to firmware limitations rather than real-time measurement.</li>
</ul>

Background information clarifies that the app measures both charging and discharging currents: a negative value indicates battery drain when disconnected from a charger; a positive value reflects charging current supplied by a charger. For example, if your phone discharges at 300mA without a charger connected, then a 500mA charger will roughly charge at 200mA (actual reading). This approximation aids in comparative assessments rather than precise quantification.

The displayed current is calculated as an average of 50 measurements, excluding the top 10 and bottom 10 values to smooth fluctuations. Variability in readings may occur due to hardware differences and system stability issues. As battery management varies across devices, actual results may fluctuate accordingly.

Additional technical notes mention that LiPo batteries do not draw maximum current throughout charging; current diminishes as the battery approaches full capacity. Relevant resources include explanatory graphs and tutorials on LiPo charging stages for further understanding.

Supported devices with "Old measurement method" enabled include:
<ul>
 <li>HTC One M7 / M8</li>
 <li>LG G3</li>
</ul>

Devices reported incompatible with the app encompass:
<ul>
 <li>Galaxy Grand Prime - fortuna3gdtv</li>
 <li>Galaxy Note2 - t03g series</li>
 <li>Galaxy S3 - d2 series</li>
 <li>Galaxy Tab4 7.0 - degas3g</li>
 <li>HTC Desire 510 - htc_a11ul8x26</li>
 <li>HTC models: One S (ville), X (endeavoru), XL (evita)</li>
 <li>HTC Sensation 4G - pyramid</li>
</ul>

Please do not rate poorly if your device appears in this list; support depends on hardware capabilities, not app functionality.

If compatibility issues arise with pre-Lollipop Android devices, consult the threads at http://goo.gl/pZqJg8 on XDA Developers for solutions and post problem reports with screenshots for assistance. Also review the FAQ at http://goo.gl/R8XgXX for further guidance.

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