How can I make the battery last longer?

Jolla Care -

Battery lifetime depends on how the device is used. Making a lot of calls, games and playing streaming videos consumes a lot of power compared to the case where the device is in idle state display blanked. Your device heating up is a sign of heavy strain on the device, meaning high battery drain.

If you are experiencing issues with starting up your device, sudden shutdowns or very rapid shifts in battery capacity, please send us a repair request.

 

CONTENTS

1. What drains the battery?

2. Investigating applications and processes as the cause for battery drain
2.1. Monitoring the device
2.2. Controlling the Android (TM) App Support
2.3. Apps from untrusted sources

3. Sudden shutdowns or notable variance in battery charge levels

 



1. What drains the battery?

Below are some general tips on how to maximize battery life. The tips listed below are meant to give you an understanding of what drains the battery, so that when needed you can try to lighten the load on the battery and lengthen the battery life.

  • Always use the latest available version of SailfishOS. Go to Settings > Sailfish OS updates and pull down "Check for updates".
  • Close apps that you do not probably need in the next couple of hours.
  • Set the Sleep after time as short as is convenient for you (Settings > Display)
  • Set the Brightness base level as low as still convenient (Settings > Display)
  • Set the background synchronization of email and other accounts to happen as seldom as good for you. Specify dedicated sync intervals for your email accounts in Settings > Accounts > <your Email accounts>. This same setting applies to the calendar sync, too.
  • Turn Bluetooth and NFC off unless you need it on a regular basis (Settings > Bluetooth and Settings > NFC).
  • Turn Internet sharing (WLAN hotspot, tethering) off if no more needed.
  • Turn Location service off in Settings > Location if you are not using map applications daily. Depending on the navigation settings of those apps, the current drain from the battery may grow significantly.
  • Disable the  Settings > Android App Support unless you use your Android apps regularly. There is more information about this later in this article.
  • Consider turning mobile data off if you can be connected to the Internet via WLAN. You would still be reachable via phone calls.
  • Check the network mode of mobile data. By default, your device will search for the fastest network available (4G), but if speed is not critical to you or you usually use a WLAN network, then consider using 2G or 3G mobile network instead (Settings > Mobile network > Network mode). Your battery life should be best on the "Prefer 2G" setting.
  • Select the cellular operator (carrier) with the best network in your area. The better the network coverage, the less the phone needs to rely on remote base stations and to swap between network generations (4G, 3G, 2G). If the operator has a firewall for mobile data then the phone will receive less (unnecessary) incoming data traffic, allowing it to stay in a suspended state longer.
  • Turn WLAN off unless you need it on a regular basis (Settings > WLAN). But it may be wiser to keep WLAN on and turn mobile data off.
  • Enable the battery saving mode (Settings > Battery).
  • Keep the phone connected to a charger when you sleep (or do not actively use the phone).

It is also good to restart the phone every now and then (once a week), and especially if it feels warm. It may be that after you have closed an application the system has failed in turning off all the processes the application (especially an Android app) required.

Sometimes it can also work to give your device a "fresh start" by resetting your device back to factory settings. This gets rid of any broken or badly working pieces of software and gives the software a fresh start. Creating a backup is greatly recommended before this procedure.



2. Investigating applications and processes as the cause for battery drain

It is quite rare, that the battery itself is the main culprit of the battery drain. This is why it is good to attempt to rule out that applications or stuck processes aren't causing a heavy load on the phone, thus creating a battery drain and possible heating up of the device.



2.1. Monitoring the device

There are applications that list the running applications and processes in your device, and report how much CPU power and memory they require.

Search for one or more of the following applications in the Jolla Store. Consider installing them to your device.

  • Crest
  • Lighthouse
  • Battery Log


A) The pulley menu of Crest has a number of settings which are used to select the kind of data interesting to you. In the example below, the settings make the app show only applications and sort them by their impact on CPU power.

  • set Autorefresh ON
  • set Apps only ON for an overview, or OFF to show a detailed view including various processes
  • tap Sort by CPU once or twice so that the highest % figure gets to the top of the left-most column

If you contact Jolla customer support we would like to get a screenshot of the listing of your Crest. Take the screenshot by long-pressing both volume keys at the same time. Collect the screenshot from folder Pictures/Screenshots.

Pictures 1a and 1b: Screen captures from Crest main view and Settings.

 

B) Use Lighthouse (pictures below) in the following way:

  • open the app
  • tap Processes to get a detailed view on which processes are running in the system - they are automatically sorted so that the active processes are show on top

If you contact Jolla customer support we would like to get a screenshot of the listing of your Lighthouse. Take the screenshot by long-pressing both volume keys at the same time. Collect the screenshot from folder Pictures/Screenshots.

 

 

Pictures 2a and 2b: Lighthouse main view on the left, and the "Processes" view on the right. Processes sorted by their CPU Usage.

 

 

C) The pulley menu of Battery Log has the settings menu. It is probably best to select the shortest storage period of 5 days, first, and then tap (as many times as required) on the graph area of the app to make it say "Displaying 1 day(s)". In this way, the battery curves start developing to the main display of the app sooner. You can adjust the colours of those curves in the settings, to your liking.b

Battery Log is useful in following the overall current consumption over time. It may help in finding some special points in the timeline when the current drain or CPU usage goes high, and thereby figure out what is causing the abnormal behaviour.

If you are able to pinpoint an application or process that is constantly running at high CPU power, you now have tools to investigate the issue further.

  • If its an application, consider uninstalling or updating the application.
  • If it relates to a phone process, see if you can investigate the app it could be related to, or whether a simple reboot would solve the situation.
  • A device reset is often the best way to determine whether the software is causing the increased drain of the battery. Resetting your device is likely to have positive implications on the battery life.



2.2. Controlling the Android (TM) App Support

The purpose of stopping or starting the Android App SUpport is to see whether it is a process related to an Android application that is causing the battery drain because it is stuck or simply power hungry.

AAS-settings.png

Stopping Android App Support: ends all processes related to the Android service, including background tasks. The service will be automatically restarted if you launch an Android app (in this case it takes longer to get the app up and running).

Starting Android App Support: you can manually start the Android App Support when needed. This is an alternative to letting Sailfish OS start the service when the device is restarted.

Start Android App Support on bootup means that Sailfish OS will start the service automatically when the device is started up. Hence the service will be running in the background, making it faster to open Android apps and making it possible to receive notifications from the installed apps (e.g. notifications on received Whatsapp messages).

 



2.3. Apps from untrusted sources

It is possible to install apps to your Sailfish device such that those apps have not passed the quality control of Jolla. Typically, those apps have been developed for Sailfish but they have not yet been accepted to Jolla Store because they have failed some quality control steps.

We do not recommend installing these applications because they may cause unexpected problems which may be hard to identify and fix. They may also increase current consumption.



3. Sudden shutdowns or notable variance in battery charge levels

If you are experiencing issues with starting up your device, sudden shutdowns or very rapid shifts in battery capacity, please send us a repair request.

 

 

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