Battery Sony SY05 Green Cell

Green Cell is a high-quality replacement battery specifically designed for Sony Vaio VGN-FW series laptops, including models such as VGN-FW21E and PCG-31311M. The Green Cell SY05 battery uses Lithium-Ion cells developed by Green Cell to provide the declared capacity, stable performance and extended runtime while matching the original form and electrical parameters for safe operation.

Advantages

The SY05 battery offers a reliable source of power with high-capacity Li‑Ion cells that do not suffer from the memory effect. Built-in control electronics ensure proper communication with the laptop and include standard protections against overcharge, overdischarge and short circuit. The battery is designed to restore portability to your Sony Vaio and deliver consistent runtime over many charge cycles.

Suitable for

Key specifications

How to use

Turn off the laptop and disconnect the power adapter. Remove the existing battery following the laptop manufacturer’s instructions, then insert the Green Cell SY05 battery until it locks in place. Connect the power adapter and fully charge the new battery before first use to balance the cells. The control electronics will manage charging and communication with the laptop automatically.

Recommendations

For best long-term performance, avoid deep discharges and store the battery at about 40–60% charge if it will not be used for extended periods. Recycle the removed battery according to local regulations; Green Cell supports responsible battery recycling programs.