Editing N900 Hardware Power Consumption
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* WLAN transmit 802.11b - 150 mA | * WLAN transmit 802.11b - 150 mA | ||
- | Battery parameters can be monitored thru fuel gauge | + | Battery parameters can be monitored thru fuel gauge asic TI BQ27200 [http://focus.ti.com/lit/ds/symlink/bq27200.pdf] |
==Some preliminary numbers using [[N900 Hardware Charge Meter|the battery monitor chip]].== | ==Some preliminary numbers using [[N900 Hardware Charge Meter|the battery monitor chip]].== | ||
- | 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 + | + | 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 +, and is a total. Unless otherwise mentioned, numbers are for the idle locked case, with screen off. |
Assume | Assume | ||
- | * Suspend (echo mem >/sys/power/state), wifi and GSM off. 2 mA | + | * Suspend (echo mem >/sys/power/state), wifi and GSM off. 2 mA |
- | * Suspend, GSM on, connected to 3G (2 bars) 5 mA | + | * Suspend, GSM on, connected to 3G (2 bars) 5 mA |
- | * Suspend, GSM on, connected to 2G. (2 bars) 3.6 mA | + | * Suspend, GSM on, connected to 2G. (2 bars) 3.6 mA |
- | + | * Idle, no SIM, wlan off 7 mA@4.1 V | |
- | * Idle, no SIM, wlan off 7 mA@4.1 V | + | |
* Wifi on with maximum powersaving. +~2 mA | * Wifi on with maximum powersaving. +~2 mA | ||
- | + | * MMC card in. Under 1 mA | |
- | * MMC card in. Under | + | |
* Xchat running, sporadic traffic. +8 mA | * Xchat running, sporadic traffic. +8 mA | ||
* Screen on, no backlight. +80 mA | * Screen on, no backlight. +80 mA | ||
* Backlight on max +150 mA, +40mA on 4 of 5 steps in simple brightness applet & low ambient (/sys/class/backlight/acx565akm/brightness = 63) | * Backlight on max +150 mA, +40mA on 4 of 5 steps in simple brightness applet & low ambient (/sys/class/backlight/acx565akm/brightness = 63) | ||
- | * Media player playing MP3, one step above mute. 110 mA | + | * Media player playing MP3, one step above mute. 110 mA |
- | * Vibrator at max + | + | * Vibrator at max +100 mA |
- | * md5sum /dev/zero 250 mA | + | * md5sum /dev/zero 250 mA |
- | * md5sum /dev/mmcblk1p1 - 1G SD card. 240 mA | + | * md5sum /dev/mmcblk1p1 - 1G SD card. 240 mA |
- | * md5sum /dev/mmcblk0 - internal MMC 240 mA | + | * md5sum /dev/mmcblk0 - internal MMC 240 mA (these indicate the CPU is somewhat idle, waiting on IO, and this counteracts any increased power use by the memory) |
- | * camera active, showing preview. (backlight off) 210 mA | + | * camera active, showing preview. (backlight off) 210 mA |
* GPS - location test gui - in continuous GPS recieve mode - +50-80 mA | * GPS - location test gui - in continuous GPS recieve mode - +50-80 mA | ||
* 3G connected, good signal, no data or other activity +8 mA. | * 3G connected, good signal, no data or other activity +8 mA. | ||
* 2G connected, good signal, no data or other activity +5 mA | * 2G connected, good signal, no data or other activity +5 mA | ||
+ | |||
===2G data, short pings=== | ===2G data, short pings=== | ||
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* 1 s ping 130 mA | * 1 s ping 130 mA | ||
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3G recieving at 200 k/s 275 mA | 3G recieving at 200 k/s 275 mA | ||
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- | + | -- | |
- | + | random adds: | |
- | + | ||
- | + | ||
- | + | ||
- | + | 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 | |
- | + | ||
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- | WLAN PS-mode medium,10 mW, ssh login active, local xterm with bq27200 script loop | + | |
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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==Software== | ==Software== | ||
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* [[Wifi power saving mode]] | * [[Wifi power saving mode]] | ||
- | + | ||
[[Category:N900]] | [[Category:N900]] | ||
[[Category:N900 Hardware]] | [[Category:N900 Hardware]] |
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