Editing Make your battery last longer
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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 | + | 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. | ||
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===Offline (flight) mode=== | ===Offline (flight) mode=== | ||
- | A quick and easy way to shut down the tablet's radio transmissions (ie. | + | 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. |
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. | ||
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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 | + | 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. |
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. | ||
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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]]. |
== Perform power-saving actions on phone lock/unlock == | == Perform power-saving actions on phone lock/unlock == | ||
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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. | ||
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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. |
=== Enable SmartReflex === | === Enable SmartReflex === | ||
[[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. |
=== 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. |
== links == | == links == |
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