Lenovo 5b11n52219 Laptop Battery 4 Cell 99.99 Wh

Product Description

The LENOVO 5b11n52219 is a 4-cell lithium-ion laptop battery rated at 99.99 watt-hours and 15.52 volts. It is a factory-style replacement power cell designed for compatible Lenovo notebook systems. This battery provides the primary power source for the host laptop, enabling untethered operation and serving as backup power during AC interruptions. Installation is typically performed by a qualified computer repair technician or an experienced end user comfortable with notebook disassembly. The high-capacity 99.99 Wh rating supports extended runtime in demanding mobile computing environments.

This battery is intended for use in Lenovo laptop and notebook systems that require a 4-cell, 15.52-volt internal battery pack. The BYD/B designation indicates the battery cell manufacturer. It is suited for professional environments where extended battery life and reliable power delivery are priorities. Always verify the part number against the existing battery label or system service manual before ordering to confirm fitment.

Key Features

• 4-cell configuration rated at 99.99 watt-hours for extended runtime
• 15.52-volt nominal output voltage
• BYD/B cell manufacturer designation
• OEM-style replacement designed for direct swap installation
• High-capacity design suited for professional mobile computing use

Compatibility

Designed as an OEM-style replacement battery for compatible Lenovo laptop and notebook systems. Verify part number 5b11n52219 against the original battery label or system service documentation before installation.

Installation Notes

Battery replacement should be performed by a qualified technician familiar with laptop disassembly procedures. Power down the system completely and disconnect the AC adapter before beginning any battery service. Follow the manufacturer service manual for proper connector and bracket removal to avoid damage to surrounding components. Handle lithium-ion batteries with care and dispose of the replaced unit in accordance with local regulations.

Technical Specifications

• Cell Count: 4 cells
• Capacity: 99.99 watt-hours
• Voltage: 15.52 volts
• Cell Manufacturer: BYD/B

Standard Information

• Brand: LENOVO
• Manufacturer Part Number: 5b11n52219