Internal battery Lenovo FRU01AV4221 Li‑ion 11.1V 4400mAh for compatible Lenovo laptops

Internal Lenovo battery FRU01AV4221 is a rechargeable Li‑ion power unit with a nominal voltage of 11.1V and a capacity of 4400mAh. It is intended as a replacement internal battery for compatible Lenovo laptops and restores portable operating time for everyday tasks. The battery supports standard laptop activities such as office applications, web browsing and light multimedia playback when installed according to the laptop manufacturer's instructions.

Advantages

This internal battery offers a reliable lithium‑ion chemistry that provides a balance of energy density and cycle life. With an 11.1V nominal voltage and 4400mAh capacity, it helps extend runtime compared with depleted cells and allows the laptop to operate without continuous mains connection for typical mobile use. The design fits into the internal battery compartment of compatible Lenovo models and integrates with the laptop power management system when installed correctly.

Suitable for

• Replacing a worn or failing internal battery in compatible Lenovo laptops
• Restoring mobile runtime for office productivity and web browsing
• Light multimedia playback and presentations on the go
• Users who need original‑style internal battery performance and compatibility

Key specifications

• Battery chemistry: Lithium‑ion (Li‑ion)
• Nominal voltage: 11.1 V
• Capacity: 4400 mAh
• Intended use: Internal replacement battery for compatible laptops
• Typical applications: Office work, web browsing, light multimedia

How to use

Power down the laptop, disconnect the AC adapter and follow the laptop manufacturer’s service instructions for accessing the internal battery compartment. Remove the old battery according to the service manual steps and install the replacement unit, ensuring correct alignment of connectors and secure mounting. Reassemble the laptop, connect the AC adapter, and charge the new battery fully before first use to allow the power management system to calibrate.

Recommendations

Use the replacement battery only in supported laptop models and follow Lenovo’s safety and handling guidelines. Avoid exposing the battery to extreme temperatures, mechanical shock or liquids. For best long‑term performance, charge and discharge the battery periodically and store it at moderate charge level if the laptop will not be used for an extended period.