Editing N900 Hardware Power Consumption
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These numbers are biased, and represent best cases. Some have had outliers which may be normal and unavoidable current spikes removed. This is under the assumption that the minimal power represents the minimum power achievable, and it should long-term be possible to - possibly with software patches - achieve these. +x indicates the measurement is for that element only. A raw measurement has no + (marked "T"), and is a total consumption of whole device, when operated in that state. Unless otherwise mentioned, numbers are for the idle locked case, with screen off, battery voltage "full" = 4.0 to 4.1V. | These numbers are biased, and represent best cases. Some have had outliers which may be normal and unavoidable current spikes removed. This is under the assumption that the minimal power represents the minimum power achievable, and it should long-term be possible to - possibly with software patches - achieve these. +x indicates the measurement is for that element only. A raw measurement has no + (marked "T"), and is a total consumption of whole device, when operated in that state. Unless otherwise mentioned, numbers are for the idle locked case, with screen off, battery voltage "full" = 4.0 to 4.1V. | ||
Assume | Assume | ||
- | * Suspend (echo mem >/sys/power/state), wifi and GSM off. 2 mA T | + | * Suspend (echo mem >/sys/power/state), wifi and GSM off. 2 mA T |
- | * Suspend, GSM on, connected to 3G (2 bars) 5 mA T | + | * Suspend, GSM on, connected to 3G (2 bars) 5 mA T |
- | * Suspend, GSM on, connected to 2G. (2 bars) 3.6 mA T | + | * Suspend, GSM on, connected to 2G. (2 bars) 3.6 mA T |
- | + | ||
* Idle, no SIM, wlan off 7 mA@4.1 V T | * Idle, no SIM, wlan off 7 mA@4.1 V T | ||
* Wifi on with maximum powersaving. +~2 mA | * Wifi on with maximum powersaving. +~2 mA | ||
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--[[User:joerg_rw|joerg_rw]] 12:28, 13 May 2015 (UTC) | --[[User:joerg_rw|joerg_rw]] 12:28, 13 May 2015 (UTC) | ||
- | WLAN PS-mode medium,10 mW, ssh login active, local xterm with bq27200 script loop | + | WLAN PS-mode medium,10 mW, ssh login active, local xterm with bq27200 script loop -9, screen blanked, aggressive custom breathing indicator light: 20 mA |
xchat 8 freenode chan, wifi PSM medium, screen locked: | xchat 8 freenode chan, wifi PSM medium, screen locked: | ||
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18:40 4087 99 99 -64 1180 1180 1180 65535 3403 36 0 | 18:40 4087 99 99 -64 1180 1180 1180 65535 3403 36 0 | ||
</pre> | </pre> | ||
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===A script to monitor the power consumption for a minute using bq27x00_battery=== | ===A script to monitor the power consumption for a minute using bq27x00_battery=== | ||
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Go measure it yourself. | Go measure it yourself. | ||
[[User:l29ah|l29ah]] 23:40, 14 May 2015 (UTC) | [[User:l29ah|l29ah]] 23:40, 14 May 2015 (UTC) | ||
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<pre>apt-get install perl</pre> | <pre>apt-get install perl</pre> | ||
<pre> | <pre> | ||
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print mean(@pa); | print mean(@pa); | ||
</pre> | </pre> | ||
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==Software== | ==Software== |
Learn more about Contributing to the wiki.