On occasions you may have wondered why the battery in your Tablet PC is not lasting as long as it should and need to find out the reason.  The cause is most often due to the settings used in the tablet PC that will cause it to draw more power. For example this can be due to Wi-Fi or screen brightness settings. Sometimes apps running in the background can consume more power.
Android 4.1 does provide limited information on the battery status in the i-LAN tablet PC. In the settings app touching DEVICE>>Battery will provide a graphical display of the battery status (charging, discharging) and level of charge (as a percentage of fully charged). The graph shows the battery level over time, since you last charged the tablet, and how long you’ve been running on battery power.

 Thin green lines below the chart indicate short periods of time when you were connected to a charger. The thin blue line shows when the tablet was active.

Thin green lines below the chart indicate short periods of time when you were connected to a charger. The thin blue line shows when the tablet was active.

Touching the graph provides more detailed information.
The Blue bars indicate the period of time that various apps were running. The Green bar shows the period that the battery was being charged.

The Blue bars indicate the period of time that various apps were running. The Green bar shows the period that the battery was being charged.


To get more detailed information on the battery condition and power consumption due to various settings or apps running in the tablet PC you will need to install one of the many apps that are available from Google Play Store.
They will you help monitor battery usage and work out what is consuming the most power. Many will provide a history of battery charge/discharge rates. Unusual battery charge/discharge rates can indicate a problem with the battery or charger.  A few good apps to look at are:
[tw_accordion][tw_accordion_item item_title=”Battery Monitor Widget” item_expand=”false”]This app provides a historical graphical display and list of the battery level and charge/discharge cycles. It also provides information on how much power is being consumed by each app and setting in the tablet PC.
Features are:

1. Graphical display of battery level showing charge/discharge cycles over a one week period.
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2. Battery Statistics
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Battery usage and level details with a time stamp. These will correspond to the graphical display.
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3. Battery Management
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[tw_button icon=”icon-downloard” link=”https://play.google.com/store/apps/details?id=ccc71.bmw&feature=search_result#?t=W251bGwsMSwxLDEsImNjYzcxLmJtdyJd” size=”medium” rounded=”false” style=”flat” hover=”default” color=” ” target=”_blank”]Download App[/tw_button][/tw_accordion_item]
[tw_accordion_item item_title=”GSam Battery Monitor” item_expand=”false”]
This free app has many features. A few of these are:
1. Status bar notification for battery state and time left estimates
2. Detailed display of what is using your battery
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3. Lists showing app usage allowing sorting by things such as CPU usage, Sensor usage, Wake Locks, Wake Time, Kernel Wakelocks, etc.
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Battery usage can be displayed in graphical format. Battery usage is shown in blue and apps are shown as an orange bar on the graph.
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[tw_button icon=” icon-download” link=”https://support.google.com/android/answer/3094742?hl=en&rd=1″ size=”medium” rounded=”false” style=”flat” hover=”default” color=” ” target=”blank”]Download App[/tw_button]
 
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Carat is a free app that generates personalized recommendations for improving the battery life of the tablet PC. After observing your use of the tablet PC for *about a week*, it will start to generate reports just for you.You just need to open it every few days so it can send data to its servers, and within a week Carat will start recommending Actions and even predicting the improvements you will see. Although Carat cannot measure energy use directly, it infers what apps are responsible using advanced machine learning methods.
Carat will tell you which apps it thinks are hogs (they use a lot of battery) and which are bugs (they use a lot of battery on your tablet PC.  Closing these apps when they are not required will extend the battery runtime in the tablet PC.
Carat is under active development by a team of researchers in the AMP Lab at UC Berkeley.
Some of the features of this app are:
1.        Device Information
Displays the J-Score which tells you how your battery efficiency compares to other users. Also displays running apps memory/CPU usage.
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2.      Bugs
These are apps that use a lot of energy. Re-starting the app may improve battery life.
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3.       Hogs
These are apps that are correlated with higher energy use. Closing these apps may improve battery life.
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4.       Actions
This provides a recommendation for which app to close and the expected improvement in battery life.
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[tw_button icon=”icon-download” link=”https://play.google.com/store/apps/details?id=edu.berkeley.cs.amplab.carat.android&feature=search_result#?t=W251bGwsMSwxLDEsImVkdS5iZXJrZWxleS5jcy5hbXBsYWIuY2FyYXQuYW5kcm9pZCJd” size=”medium” rounded=”false” style=”flat” hover=”default” color=” ” target=”_blank”] Download App[/tw_button]
 
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