Figure 7: Export options from Nokia Energy Profiler.

Figure 8: Exported .csv text files can be opened in Excel.

Figure 12: Power view displays watts (W).

Power view shows the power consumption over a measurement period. The basic unit is a watt (W). The user can switch between average and instant power.

The average bar displays the mean power value for the active measurement region that is delimited by vertical gray markers. You can also add markers, but currently you cannot delete them once added. The corner indicator shows either battery time or total energy consumed in the region. Battery time is the estimated time elapsed before the battery gets empty assuming the measured average power consumption and total energy consumed in the region. Note that all indicators always refer to the current active region, not the entire measurement file possibly with multiple measurements.

Figure 13: Current view shows amperes (A).

Current view displays current consumption which is calculated by the measured power divided by the measured voltage. As the battery discharges, voltage drops and current will increase so that power consumption stays roughly equal. Current consumption for the same use case varies depending on the battery charge. You can use Tools > Normalize current to recalculate the current measurements for a reference 3.7V voltage. The corner indicator values are the same as in Power view.

Figure 14: Processor view shows processor load (%).

Processor view shows the CPU load over a measurement period as a percentage of the total available processing capability. Values are between 0 and 100%, where 0% is no processing and 100% is maximum processing. Note that different mobile devices have different CPUs, such as ARM9 and ARM11. Also cache sizes and chipset performance can vary. See detailed device specifications.

Figure 15: RAM Memory view displays memory usage (MB and KB).

RAM Memory view displays the RAM memory usage over the period. The units are KB and MB, where KB is 1024 bytes and MB is 1024 KB in this view. The bright blue line represents the allocated memory and the light blue line is the total RAM memory available to S60 software. This can be different from the total physical RAM memory since memory may be reserved for exclusive use. The delta symbol indicates the difference between maximum and minimum memory usage over the region. This is the overall operating system usage, not just that of your application’s. It illustrates memory dynamics of the application during the measurement. The memory may have been allocated not only by your application, but also the operating system components it depends on. For this reason, a difference in extreme beginning and end does not necessarily mean a memory leak. It is wise to check applications running in the background if the memory consumption slowly crawls higher over days, eventually causing a memory-full error situation.

Figure 16: Network view displays downlink and uplink data connection speeds (kBytes/s).

Network view presents the downlink (download) and uplink (upload) speeds through the IP stack (Internet Protocol). The unit is KB which is 1000 bytes in this view. Downlink and uplink speeds are shown simultaneously on the screen in green and orange, respectively. Note that you can combine this view with other views through the dual view feature if you hold the [0] key. The average and instant bars are either for downlink or uplink data, depending on the selected input. You can toggle the data input with the [6] key. The same key also toggles the corner indicator that has the total amount of data transferred for downlink (arrow down) or uplink (arrow up).

Figure 17: Signal Levels view shows receive and transmit values (dBm).

This view shows the cellular signal levels as RX and TX levels. RX level corresponds to the power of the received cellular signal. TX level refers to the transmission power from the cellular radio. Both measures are in dBm. TX levels show up only during active transmission periods (voice or data). RX levels are available whenever connected to a cellular network. This means there is no RX level in the Offline phone profile. Average/instant bar values are for the selected signal that is shown in the corner indicator. You can toggle the chosen signal with the [6] key. Unlike all the other views, the zero y-axis is in the bottom of the screen. RX levels are typically between -30 to -120 dBm (a lower value means poorer signal), whereas TX levels are positive dBm (a higher value means more power).

Figure 18: Energy view.

Energy view shows the cumulative energy consumed over the measurement period. The unit is ampere-hour (Ah). Actually this is not the unit for energy, but is commonly used to rate rechargeable battery capacity. 1200 mAh means 1.2 Ah. Note that the Energy view is not available while recording because it is computed in real time. The view is Off by default. Use Options > Settings and the Views tab to activate.

Figure 19: Energy view.

Voltage view shows the battery voltage levels over a measurement period. As the battery discharges, its voltage level will decrease from roughly 4.2V down to 3V until the phone switches itself off. Shutdown actually happens before the battery is totally exhausted and thus the Battery Time estimate shown and actual operating times will slightly differ. The view is Off by default.

• Start and stop measurements with the [2] key.
• Press the Camera key to take a user interface screenshot and see what was done with the application at a specific time. See Options > Settings and the Screenshots tab for advanced options.
• More vertical zoom is available if you hold Down / Up key in the normal zoom extremes for most views.
• Rotate he display to landscape/portrait by holding the [7] key.
• Check out the dual view mode by holding the [0] key. Try CPU and Power views, for example.
• Use 1 or 5 second measurement period if you want more accurate results in standby.
• Do not keep unnecessary applications running during the test. Applications on the background may affect the measurements because Nokia Energy Profiler measures the total power consumption.
• During record or view mode, you can insert markers to the trace by holding the [5] key.
• Do not keep the charger connected during measurements because it produces erroneous results. The graph background is gray when the charger is connected.
• Recording with 1 second mode and inserting the charger plug will cause system crash in some older phones.
• Although the battery capacity is usually correct, you should check it because it may sometimes have a wrong mAh value.
• Energy Profiler has an emergency save feature. You can measure until the battery dies and recover the file on the next launch of the tool.
• Control and plug-in API exists and will be available soon.
• Place Nokia Energy Profiler first in the list of Active Standby Applications. This way you can quickly switch to it from the active standby screen.

Figure 20: Having the tool in Active standby apps makes use easier. Press the End key to move the Energy Profiler screen to the backround.