ASUS S400 4000mAh 11.1V Laptop Battery for S300 S400CA S400E C31-X402

If your ASUS S400 shuts off as soon as the charger is pulled, a new battery is the quickest fix. The ASUS S400 battery price in BD at QASWATEC covers a brand-new 4000mAh, 11.1V Li-ion pack, also listed as C31-X402, for the S300 and S400 families. It is stocked at our Elephant Road showroom in Dhaka.

Key Features of the ASUS S400 Battery

• Series: S300 / S400 (C31-X402)
• Capacity: 4000mAh
• Voltage: 11.1V
• Type: Li-ion, black
• Condition: Brand new

Compatible ASUS Laptops

This battery fits ASUS S300, S400, S400CA and S400E laptops, listed by the supplier with the C31-X402 code. Match the model and part number printed on your old battery before you order. Our staff can check it with you at the showroom if you bring the old pack.

Signs the Battery Needs Replacing

• The laptop turns off soon after unplugging
• Backup time is only a few minutes
• Battery percentage drops or jumps suddenly
• The laptop is plugged in but not charging

Why Replace It Early

A worn battery ties a laptop to the wall. In a power cut the machine switches off at once and unsaved work can be lost. A fresh pack gives students and office users real mobility again.

What You Get

You receive one new battery pack ready to fit into your ASUS laptop. It is checked before sale, and you can ask our team to confirm the fit against your old battery before you pay.

Care Tips for Longer Life

• Use the original charger or a good quality adapter
• Do not keep the laptop at 100 percent on charge for weeks
• Keep the vents clean so heat does not age the cells
• Charge the new battery fully the first time

Buy the ASUS S400 Battery from QASWATEC

QASWATEC has supplied laptop parts and accessories across Bangladesh since 2010 from Elephant Road, Dhaka. Our staff confirm the warranty at purchase and help you check compatibility. Visit the showroom or order online to get your laptop running on battery again.