Can't find a original asus vivobook s551ln battery? Here is what you need.

Original asus vivobook s551ln battery pack is available on www.storebattery.co.nz, the battery spec is 11.4V 4210mAh. You may find there are other capacity available on market, please feel free to us it as long as it is compatible. Also you may noticed your battery model number is C31-S551, 0B200-00450500 or B31N1336. They are fully compatible. More detail is as below:

Voltage: 11.4V
Capacity: 4210mAh (48Wh)
Battery cells: 6-cell
Chemical: Li-ion
Battery Color: black
Condition: new original battery
Warranty: 9 months

asus vivobook s551ln battery

Here tells you how to maximize my asus vivobook s551ln battery life? You can try doing any of the following suggestions:
•Use Battery Mode under PowerGear.
•Use the function keys to adjust the display brightness.
Enable Battery Saving mode under Instant On.
•If you are not using any Wi-Fi connection, switch your system into Airplane mode.
•Disconnect unused USB devices.
•Close unused applications, especially those that take up too much system memory.

Source from manual.

Notice before replacing the Hard Disk Drive (HDD) on ASUS G750JX laptop

Refer to the following notice if you need to replace the hard disk drive of your ASUS G750JX.
IMPORTANT! Purchase an HDD from authorized retailers of this ASUS G750JX to ensure maximum compatibility and reliability.It is recommended that you replace the HDD under professional supervision. You may also visit an authorized service center for further assistance.
WARNING! Disconnect all the connected peripherals, any telephoneor telecommunication lines and power connector (such as external power supply, battery pack, etc.) before removing the compartment cover.
NOTE: The appearance of your ASUS G750JX's bottom side and HDD may vary per model but the HDD installation remains the same.

ASUS G750JX battery 

ASUS G750JX battery 

Upgrade the ASUS battery, ASUS G750JX 15V 5900mAh laptop batteries
Voltage: 15V
Capacity: 5900mAh (88Wh)
Battery cells: 8-cell
Chemical: Li-ion
Battery Color: Black
Condition: new original battery
Warranty: 9 months