Internal laptop battery Lenovo 01AV421 3-cell 24Wh Li-Ion

Replacement internal Li‑Ion battery designed for compatible Lenovo laptops, model 01AV421. This 3-cell, 24 Wh battery restores mobile runtime for everyday tasks and travel, serving as an OEM-equivalent power source for supported devices. It is intended to replace worn or faulty original packs and to provide stable voltage for standard laptop operation while maintaining a compact, lightweight form factor suitable for internal installation.

Advantages

The 3-cell Li‑Ion chemistry provides a balance between capacity and weight, delivering 24 Wh of nominal energy to extend laptop usage between charges. As an internal replacement battery, it offers direct compatibility with designated Lenovo models and supports straightforward installation without external adapters. The battery is engineered for consistent power output under normal operating conditions and is manufactured to meet standard safety and performance expectations for OEM-equivalent parts.

Suitable for

• Replacing worn or failing internal batteries in supported Lenovo laptop models
• Extending portable runtime for everyday office work, web browsing and media playback
• Use during travel or mobile work when mains charging is unavailable
• Service and repair tasks requiring a direct-fit internal battery replacement

Key specifications

• Battery type: Lithium‑ion (Li‑Ion)
• Cell configuration: 3-cell
• Nominal energy capacity: 24 Wh
• Intended form factor: internal laptop battery
• Typical use: OEM-equivalent replacement for supported Lenovo laptops

How to use

Power down the laptop and disconnect any external power source before beginning installation. Remove the laptop’s bottom cover or service panel according to the device manufacturer’s instructions to access the internal battery compartment. Disconnect the existing battery connector carefully and remove any fastening screws or brackets. Install the replacement battery in the same orientation, secure it with the original fasteners and reconnect the battery cable to the motherboard. Reassemble the cover, reconnect mains power, and perform a battery charge cycle to calibrate the new pack if required by the laptop’s battery management system.

Recommendations

Use the replacement battery only in compatible Lenovo models and follow the laptop manufacturer’s service instructions. Avoid exposure to high temperatures, physical damage, or moisture. For best long-term performance, store the battery at partial charge if the device will be unused for extended periods, and follow proper recycling or disposal regulations for lithium-ion batteries.