Laptop battery Lenovo 45Wh 3-cell lithium-polymer (replacement) compatible models unspecified

Replacement laptop battery for Lenovo with 45Wh capacity and 3-cell lithium‑polymer chemistry designed to restore portable power to compatible notebook models. This unit is intended as a direct replacement for a degraded or no longer functioning internal battery and supports common mobile computing activities such as web browsing, office applications and media playback. Before purchasing, verify compatibility with your specific Lenovo model and service manual to ensure correct fit and connector type.

Advantages

This 45Wh 3-cell lithium‑polymer replacement battery offers a balance of energy capacity and compact size suitable for many ultraportable and mainstream Lenovo notebooks. The lithium‑polymer construction provides a slim profile and uniform cell shape to match internal battery compartments. Designed for straightforward replacement, the battery can restore original run times when the factory unit has lost capacity and helps maintain uninterrupted productivity on the go.

Suitable for

• Restoring battery runtime on compatible Lenovo laptops
• Replacing degraded or no longer charging internal batteries
• Mobile office work: documents, spreadsheets and email
• Web browsing, streaming video and light multimedia use

Key specifications

• Capacity: 45 Wh
• Cell count: 3‑cell configuration
• Chemistry: lithium‑polymer (Li‑Po)
• Form factor: internal notebook battery designed for slim laptop compartments
• Intended function: rechargeable replacement battery for portable computing

How to use

Power down the laptop and disconnect any external power source before beginning replacement. Open the laptop service cover or remove the bottom case according to the manufacturer’s instructions, taking care to keep screws and small parts organized. Disconnect the existing battery connector from the motherboard, remove the old battery, and install the replacement ensuring the connector orientation and seating match the original. Reassemble the laptop and connect the AC adapter; allow the new battery to charge fully before first use to calibrate state-of-charge reporting.

Recommendations

To maximise service life and safety, use the replacement battery with the laptop’s original charger or a compatible certified adapter, avoid exposure to high temperatures, and follow proper disposal or recycling procedures for the removed battery. If uncertain about disassembly or compatibility, consult a qualified service technician or refer to official Lenovo support documentation.