Chapter 12. Plugins 155
Voltage The battery voltage in mV at the moment the measurement was taken.
C This stands for Charger. An “A” in that column shows if the power adapter was
attached to the unit at the time of the measurement.
U USB powered. Only for targets that support this. A “U” will indicate if the unit was
using the USB port for power at the time of the measurement.
Usage
The log file can be used to tell you how long the battery lasted (with some limitations, see
below), but it is most useful for graphing discharge curves in order to improve Rockbox’s
estimation of battery level and time remaining. The battery log (battery_bench.txt)
is in CSV format (comma separated variables) and thus can be easily imported into a
spreadsheet or similar program.
Limitations
As Battery Benchmark needs to write the data held in memory to disk in order to
save them, it is possible that should Rockbox shut down due to low battery then there
will not be enough power remaining to write the data to disk. Therefore all measurements
since the previous save will be lost.
12.4.3. Calculator
Figure 12.48.: Calculator
This is a simple scientific calculator for use on the player. It works like a standard
calculator. Pressing the “1st” and “2nd” buttons will toggle between other available
math functions.
The Rockbox manual (version rUnversioned directory-150220)Sansa e200 and e200R Series
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