FJCY5 M5Y1K 14.8V 40Wh 4-Cell Li-ion Laptop Battery for Inspiron 14 3451 5458 15 3551 3558 Latitude 3470 3560 3570

This FJCY5 / M5Y1K replacement laptop battery is designed for select Inspiron, Latitude, and Vostro laptop models that use a removable 14.8V 4-cell lithium-ion battery pack. It is a direct-fit aftermarket replacement for systems originally configured with compatible 4-cell battery part numbers such as M5Y1K, 991XP, VN3N0, FJCY5, 07G07, and 78V9D.

Built with long-lasting Li-ion cells, this battery is ideal for replacing an aging, weak, or non-charging laptop battery and restoring portable runtime for compatible systems.

Technical Specifications

• Brand: Unbranded
• Battery Type: Laptop Battery
• Battery Chemistry: Lithium-ion
• Voltage: 14.8V
• Capacity: 2.7Ah
• Watt Hours: 40Wh
• Number of Cells: 4-Cell
• Form Factor: Removable laptop battery pack
• Compatible Battery Family: M5Y1K / FJCY5 4-cell battery series

Interchangeable / Replacement Part Numbers

FJCY5, 0FJCY5, M5Y1K, 991XP, 0991XP, VN3N0, 0VN3N0, 07G07, 007G07, 78V9D, 078V9D

✅ Confirmed Compatibility

Please note that the following list is not exhaustive. Compatibility depends on your system's specific configuration. It's essential to verify compatibility with your system or enclosure manufacturer prior to installation.

✔️ Inspiron 14: 3451, 3452, 5458
✔️ Inspiron 15: 3551, 3558, 5551, 5552, 5555, 5558, 5559
✔️ Inspiron 17: 5755, 5758, 5759
✔️ Latitude: 3470, 3560, 3570
✔️ Vostro 14: 3458
✔️ Vostro 15: 3558

☑️ Key Features

☑️ 14.8V 40Wh 4-cell Li-ion replacement battery for compatible laptop models
☑️ Replaces common battery part numbers including M5Y1K, FJCY5, 991XP, VN3N0, 07G07, and 78V9D
☑️ Designed to restore portable runtime when the original battery is weak, worn, or no longer holding a charge
☑️ Removable battery pack design for straightforward replacement on supported systems
☑️ Compatible with select Inspiron, Latitude, and Vostro laptop models
☑️ Ideal for repair shops, IT departments, refurbishers, and end users replacing aging laptop batteries

⚙️ Fit Notes

• Please verify the battery part number printed on your original battery before ordering.
• This listing is for the 14.8V 40Wh 4-cell battery style. Battery shape, voltage, connector position, and system compatibility should be matched before installation.
• Some laptop model families were sold with multiple battery options. Always confirm your original battery part number or laptop service tag compatibility when possible.
• For best performance, fully charge the replacement battery after installation and allow the system to complete normal battery calibration through regular use.
• Do not install or reuse a swollen, punctured, leaking, or physically damaged battery.