How can I maximize ASUS X540L's battery life? You can try doing any of the following suggestions:

How can I maximize ASUS battery life? You can try doing any of the following suggestions:
• Use the function keys to adjust the ASUS X540L display brightness.
• If you are not using any Wi-Fi connection, switch your ASUS X540L system into Airplane mode.
• Disconnect unused USB devices.
• Close unused applications, especially those that take up too much system memory.

ASUS X540L battery

ASUS X540L battery

Brand new ASUS X540L battery 11.25V 2900mAh laptop batteries
Voltage: 11.25V
Capacity: 2900mAh (33Wh)
Battery cells: 3-cell
Chemical: Li-ion
Battery Color: Black
Condition: new original battery
Warranty: 9 months