Battery Green Cell AS77 for ASUS laptops — Li-Ion 15 V, 2200 mAh, 4 cells, black

Green Cell AS77 is a replacement lithium-ion battery designed for ASUS laptop models F550, F750, K550, K750, R510, R750, X550 and X750. The battery uses Green Cell Li‑Ion cells and control electronics developed to match the original specifications, providing the stated capacity, stable operation and protection against common electrical faults. The pack is black and has a nominal capacity of 2200 mAh.

Advantages

The Green Cell AS77 battery combines high-capacity Li‑Ion cells without memory effect and modern control electronics to deliver reliable runtime and stable power delivery. Its cells are selected for long cycle life, with durability up to about 1,000 full charge cycles, while integrated protections ensure safe communication with the laptop. The housing is shaped to fit compatible ASUS models for secure installation.

Suitable for

• Replacing a worn or failing battery in ASUS F550, F750, K550, K750, R510, R750, X550, X750 laptops
• Restoring mobility for travel, meetings or work away from a power outlet
• Users who need a straightforward, plug‑and‑play battery replacement

Key specifications

• Model: Green Cell AS77 (MPN: AS77)
• Compatible models: ASUS F550 / F750 / K550 / K750 / R510 / R750 / X550 / X750
• Battery technology: Lithium‑Ion (Li‑Ion)
• Capacity: 2200 mAh
• Colour: Black

How to use

Turn off the laptop and disconnect it from mains power before replacing the battery. Remove the old battery according to the laptop manufacturer’s instructions, insert the Green Cell AS77 into the battery bay until it locks in place, then reconnect power and start the laptop. Allow the new battery to complete a full charge cycle for initial calibration and check battery status in the operating system.

Recommendations

For prolonged battery life, avoid exposing the battery to extreme temperatures, store the laptop with a partially charged battery if not used for long periods, and follow proper recycling procedures for the replaced battery.