740U3E Series Battery can only charge to 80%, how to solve? (WIN8)

Method One:

1. In desktop mode, press the keyboard "Fn" + "F1" key combination to open the "Settings" software.

 

 

2. Select "Power Management" on the left.

 

3. In the power management, click on the "Battery life extension device."

 

4. Slide the slider below the battery life extension to the left, as shown below:

5. When selected to "off" can be, the following figure:

 

Method Two:

1. When the screen appears blue background of Samsung logo screen, quickly press the keyboard "F2" key.

 

 

2. At this point you can enter the BIOS, as shown below:

 

3. In the upper-left option, select "Advanced".

 

4. You can see all the options in "Advanced" at this point, as shown in the following figure:

 
 

5. Find the Battery life Cycle Extension option, you can see this option is on state, The following illustration:

 

6. Slide the right slider to the left, and change this option to "off", as shown in the following figure:

 

7. When the settings are complete, click Save on the right and choose "Yes" according to the prompts to save the exit.

 

 

When you are done with any of these methods, you can charge your laptop's battery to 100%. If the problem is not resolved, please contact your local service center.