Make your battery last longer - Revision history

imported_>joerg_rw: /* Turn down the screen brightness as low as you can cope with */ bold

2014-04-07T16:18:17Z

Turn down the screen brightness as low as you can cope with: bold

← Older revision		Revision as of 16:18, 7 April 2014
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	== Turn down the screen brightness as low as you can cope with ==		== Turn down the screen brightness as low as you can cope with ==

	One of the major sources of battery drain on a portable device is the screen. If it's very large and very bright, it will use up a lot of battery life when it's lit.		One of the '''major sources of battery drain''' on a portable device is the screen. If it's very large and very bright, it will use up a lot of battery life when it's lit.

	One of the best things you can do to save battery life is to turn down the brightness on your tablet's screen to the lowest level that you feel comfortable with. The lower it is, the more battery life you will save. Just click on the screen brightness icon (the icon that looks like a sun in the status bar at the top) and adjust the brightness on the sliding scale.		One of the best things you can do to save battery life is to turn down the brightness on your tablet's screen to the lowest level that you feel comfortable with. The lower it is, the more battery life you will save. Just click on the screen brightness icon (the icon that looks like a sun in the status bar at the top) and adjust the brightness on the sliding scale.

imported_>joerg_rw: /* Change kernel powersave bias */ rush to idle

2014-04-07T16:06:21Z

Change kernel powersave bias: rush to idle

← Older revision		Revision as of 16:06, 7 April 2014
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	Over on the [[Overclocking]] page, Fecn describes a set of scripts to modify the [[Kernel Power]] settings on phone lock/unlock, basically to underclock the CPU (or at least, undo overclocking it) whilst the device is locked.		Over on the [[Overclocking]] page, Fecn describes a set of scripts to modify the [[Kernel Power]] settings on phone lock/unlock, basically to underclock the CPU (or at least, undo overclocking it) whilst the device is locked.

			Note that this is '''contrary''' to the general "rush to idle" policy used maemo [http://www.phoronix.com/forums/showthread.php?27539-Ubuntu-Faster-But-More-Power-Hungry-Than-Mac-OS-X]

	== Use the Kernel for Power Users ==		== Use the Kernel for Power Users ==

imported_>joerg_rw: /* Use the Kernel for Power Users */

2014-04-07T15:54:42Z

Use the Kernel for Power Users

← Older revision		Revision as of 15:54, 7 April 2014
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	== Use the Kernel for Power Users ==		== Use the Kernel for Power Users ==

	Not just for [[Overclocking]], the [[Kernel Power]] package helps to save battery power and makes it easy to configure CPU frequency scaling. You should be using this for power saving purposes even if you never choose to go over the stock 600 MHz.		Not just for [[Overclocking]], the [[Kernel Power]] package helps to save battery power and makes it easy to configure CPU frequency scaling. You should be using this for power saving purposes even if you never choose to go over the stock 600 MHz.[''citation needed'']

	=== Enable SmartReflex ===		=== Enable SmartReflex ===
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	=== Powersave bias ===		=== Powersave bias ===

	The powersave bias setting modifies the behaviour of the ondemand governor to save more power by reducing the target frequency by a specified percentage. This can be used to limit the extent to which the phone will overclock, according to user-specified criteria.		The powersave bias setting modifies the behaviour of the ondemand governor to save more power by reducing the target frequency by a specified percentage. This can be used to limit the extent to which the phone will overclock, according to user-specified criteria.[''citation needed'']

	== links ==		== links ==

imported_>joerg_rw: /* Enable SmartReflex */

2014-04-07T15:53:03Z

Enable SmartReflex

← Older revision		Revision as of 15:53, 7 April 2014
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	[[Smartreflex]] is stable up to 900Mhz with =>KP50 (recommended)		[[Smartreflex]] is stable up to 900Mhz with =>KP50 (recommended)
	Having both VDD1 & VDD2 enabled will increase your battery life.		Having both VDD1 & VDD2 enabled will increase your battery life. [''citation needed'']

	=== Powersave bias ===		=== Powersave bias ===

imported_>joerg_rw: /* Observe your usage */ Warning about batery usage of battery eye

2014-04-07T15:51:49Z

Observe your usage: Warning about batery usage of battery eye

← Older revision		Revision as of 15:51, 7 April 2014
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	Some of these techniques are more efficient than others, and some affect the user-experience more than others. Try out different combinations to improve your battery life, but don't compromise too much. Find the best way for your own usage and keep your device usable!		Some of these techniques are more efficient than others, and some affect the user-experience more than others. Try out different combinations to improve your battery life, but don't compromise too much. Find the best way for your own usage and keep your device usable!

	There are good apps to help you keep tabs on your battery usage profile like [http://maemo.org/downloads/product/Maemo5/battery-eye/ Battery-Eye] that shows a history-graph of your battery levels and has some nice usage statistics, [http://maemo.org/downloads/product/Maemo5/batterygraph/ BatteryGraph] that shows everything Battery-Eye shows and can show the state of use of your processor in each time (thus showing any leakage of processing by an undesired program), so that you can see if you really have a bad process running in background and [http://maemo.org/downloads/product/Maemo5/conky/ Conky] that (among other useful things) shows your current CPU load and the most CPU-intensive apps running at the moment. All are available from the [[Extras\|Extras repository]].		There are good apps to help you keep tabs on your battery usage profile like [http://maemo.org/downloads/product/Maemo5/battery-eye/ Battery-Eye] that shows a history-graph of your battery levels and has some nice usage statistics, [http://maemo.org/downloads/product/Maemo5/batterygraph/ BatteryGraph] that shows everything Battery-Eye shows and can show the state of use of your processor in each time (thus showing any leakage of processing by an undesired program), so that you can see if you really have a bad process running in background and [http://maemo.org/downloads/product/Maemo5/conky/ Conky] that (among other useful things) shows your current CPU load and the most CPU-intensive apps running at the moment. All are available from the [[Extras\|Extras repository]]. Take care since all those monitor apps are usually quite CPU heavy and thus power hungry by themselves - all the info shown has to get acquired first, and then depending on app it needs frequent complex rendering and display updating.

	== Perform power-saving actions on phone lock/unlock ==		== Perform power-saving actions on phone lock/unlock ==

imported_>joerg_rw: /* Replace your SIM card */

2014-04-07T15:44:42Z

Replace your SIM card

← Older revision		Revision as of 15:44, 7 April 2014
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	As it turns out, an old SIM card will have a lot of scratches on its pins. Some of them may even be bent inwards or otherwise damaged.The SIM cards are not designed to last more than couple of years and they really should not be taken out of the phone frequently as this damages the pins.		As it turns out, an old SIM card will have a lot of scratches on its pins. Some of them may even be bent inwards or otherwise damaged.The SIM cards are not designed to last more than couple of years and they really should not be taken out of the phone frequently as this damages the pins.

	Long story short, old SIM cards "leak" power due to bad contacts and increased internal resistance. In addition, other users have mentioned that depending on their age, different SIM cards operate in different voltages (5V, 3V, 1.8V). The N900 has support for legacy SIM cards which means older SIMs will require more power.		Long story short, old SIM cards "leak" power due to bad contacts and increased internal resistance [''citation needed'']. In addition, other users have mentioned that depending on their age, different SIM cards operate in different voltages (5V, 3V, 1.8V). The N900 has support for legacy SIM cards which means older SIMs will require more power.

	The operator probably will give you a new sim for free if you ask kindly.		The operator probably will give you a new sim for free if you ask kindly.

imported_>joerg_rw: /* Offline (flight) mode */ GSM

2014-04-07T15:41:39Z

Offline (flight) mode: GSM

← Older revision		Revision as of 15:41, 7 April 2014
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	===Offline (flight) mode===		===Offline (flight) mode===
	A quick and easy way to shut down the tablet's radio transmissions (ie. Bluetooth and Wi-Fi) is to put the tablet into offline mode, which is the same thing as flight mode.		A quick and easy way to shut down the tablet's radio transmissions (ie. WWAN aka GSM, Bluetooth and Wi-Fi) is to put the tablet into offline mode, which is the same thing as flight mode.

	To do this, press the power button briefly so that a menu appears, click on "Offline Mode", click on "OK" as necessary, and you will be in offline mode.		To do this, press the power button briefly so that a menu appears, click on "Offline Mode", click on "OK" as necessary, and you will be in offline mode.

imported_>joerg_rw: Reverted edits by 91.207.7.141 (Talk) to last revision by joerg_rw

2014-04-07T15:31:12Z

Reverted edits by 91.207.7.141 (Talk) to last revision by joerg_rw

← Older revision		Revision as of 15:31, 7 April 2014
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	Having both VDD1 & VDD2 enabled will increase your battery life.		Having both VDD1 & VDD2 enabled will increase your battery life.

	~~p2wzZH <a href~~=~~"http://vofeowotnjjg.com/">vofeowotnjjg</a>, [url~~=~~http://deowdktitgpz.com/]deowdktitgpz[/url], [link~~=~~http://yxmccyupatsp~~.~~com/]yxmccyupatsp[/link]~~, ~~http://qhbnjqgqtrpr~~.~~com/~~		=== Powersave bias ===

			The powersave bias setting modifies the behaviour of the ondemand governor to save more power by reducing the target frequency by a specified percentage. This can be used to limit the extent to which the phone will overclock, according to user-specified criteria.

	== links ==		== links ==

91.207.7.141: p2wzZH vofeowotnjjg, [url=http://deowdktitgpz.com/]deowdktitgpz[/url], [link=http://yxmccyupatsp.com/]yxmccyupatsp[/link], http://qhbnjqgqtrpr.com/

2014-04-07T05:39:37Z

p2wzZH <a href="http://vofeowotnjjg.com/">vofeowotnjjg</a>, [url=http://deowdktitgpz.com/]deowdktitgpz[/url], [link=http://yxmccyupatsp.com/]yxmccyupatsp[/link], http://qhbnjqgqtrpr.com/

← Older revision		Revision as of 05:39, 7 April 2014
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	Having both VDD1 & VDD2 enabled will increase your battery life.		Having both VDD1 & VDD2 enabled will increase your battery life.

	=== ~~Powersave bias ===~~		p2wzZH <a href="http://vofeowotnjjg.com/">vofeowotnjjg</a>, [url=http://deowdktitgpz.com/]deowdktitgpz[/url], [link=http://yxmccyupatsp.com/]yxmccyupatsp[/link], http://qhbnjqgqtrpr.com/

	~~The powersave bias setting modifies the behaviour of the ondemand governor to save more power by reducing the target frequency by a specified percentage~~. ~~This can be used to limit the extent to which the phone will overclock~~, ~~according to user-specified criteria~~.

	== links ==		== links ==

imported_>joerg_rw: /* Switch off Bluetooth when you don't need it */ edited weird instructions about "doubleclicking" etc

2012-10-14T13:54:10Z

Switch off Bluetooth when you don't need it: edited weird instructions about "doubleclicking" etc

← Older revision		Revision as of 13:54, 14 October 2012
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	The Bluetooth wireless system is intended to let the tablet easily connect to nearby accessories or computers, but if you're not using the connection then it's worth switching it off to avoid it needlessly wasting battery life.		The Bluetooth wireless system is intended to let the tablet easily connect to nearby accessories or computers, but if you're not using the connection then it's worth switching it off to avoid it needlessly wasting battery life.

	Bluetooth doesn't use much power in standby mode so this may not have much of an impact on battery life, but if you genuinely don't need it then there's no point having it switched on. Tests proved that BT doesn't use any significant power on N900 when set to active+'''invisible'''.		Bluetooth doesn't use much power in standby mode (some 2..3mA) so this may not have much of an impact on battery life, but if you genuinely don't need it then there's no point having it switched on. Tests proved that BT doesn't use any significant power on N900 when set to active+'''invisible'''.

	To switch off Bluetooth just click on ~~the angular B icon in~~ the status bar at the top, click on "Bluetooth Settings", and untick the box marked "Bluetooth On". Click "OK" and the Bluetooth will switch off.		To switch off Bluetooth just click on the status bar at the top (or open the system-settings dialog), click on "Bluetooth Settings", and tick or untick the box marked "Bluetooth On". Click "OK" and the Bluetooth will switch on/off accordingly.
			The very next checkbox in the same dialog is for selecting visibility status of BT. Setting it to "off" (aka "not visible") will make BT not send own name all the time, thus saving part of the above mentioned power consumption of BT.
	~~To switch~~ it ~~back on again, go~~ to ~~the Applications menu~~ (the ~~green squares on the left), click on Settings, click on Control Panel~~, ~~double-click on Bluetooth and tick~~ the ~~box marked "Bluetooth On"~~.

	== Switch off Wi-Fi when you don't need it ==		== Switch off Wi-Fi when you don't need it ==