Battery Lenovo 45Wh 3-cell lithium-ion 5B10K88049 for compatible Lenovo laptops

Replacement Lenovo 45Wh 3-cell lithium-ion battery for compatible Lenovo laptops provides a rated capacity of 45Wh in a standard three-cell design. This battery is intended for users who need to restore mobile runtime and replace a worn or failing internal battery. It is a direct-swap style unit designed to match compatible laptop models and extends usable time away from mains power when installed in a supported system.

Advantages

The battery delivers a specified 45Wh capacity within a compact three-cell format, offering predictable runtime for everyday tasks such as web browsing, document editing and video playback. Its lithium-ion chemistry balances energy density and weight to keep device portability intact. As a replacement unit compatible with certain Lenovo laptop models, it restores original battery performance when the correct model compatibility is observed.

Suitable for

• Replacing a depleted or failing internal battery in supported Lenovo laptops
• Extending mobile runtime for travel, remote work or study
• Maintaining productivity during meetings or offsite tasks without access to a power outlet

Key specifications

• Rated energy: 45 Wh
• Cell count: 3-cell lithium‑ion configuration
• Chemistry: Lithium‑ion
• Form factor: Compact replacement battery designed for internal installation in compatible laptops

How to use

Before installation, confirm that your laptop model is listed as compatible and that the battery connector and mounting points match your device. Power down the laptop, disconnect the power adapter and follow the manufacturer’s instructions for safe battery replacement—typically removing an access panel or opening the chassis in accordance with the device manual. Install the replacement battery, secure any fasteners, reconnect power and perform an initial charge cycle to calibrate battery reporting as recommended by the laptop manufacturer.

Recommendations

For safe operation, use the replacement battery only in supported Lenovo laptop models, avoid exposure to extreme heat or moisture, and follow local regulations for recycling or disposal of lithium‑ion batteries. Regularly update your system firmware and power management settings to ensure accurate battery reporting and optimal runtime.