Battery Lenovo 3-cell lithium-ion 11.1V 2600mAh (model 5B11B36275)

Replacement laptop battery Lenovo 3-cell lithium-ion 11.1V 2600mAh (model 5B11B36275) is a direct-replacement power unit designed for compatible Lenovo notebooks. It supplies 11.1 volts and a nominal capacity of 2600 mAh to restore mobile runtime for everyday tasks. The battery is intended to match the original form factor and connector orientation so it can be installed without modifications, and it supports standard charging and discharging behavior typical for lithium-ion notebook batteries.

Advantages

This Lenovo 3-cell lithium-ion battery provides a balance of capacity and compact size suitable for portable use. It restores device autonomy for office applications, internet browsing and travel, and is manufactured to meet common safety and cell chemistry standards for lithium-ion packs. As a direct swap replacement, it simplifies maintenance by fitting into the existing battery bay and working with the laptop's built-in charging circuitry.

Suitable for

• Replacing a worn or failing original battery in compatible Lenovo notebooks
• Extending runtime for office work, email and web browsing
• Providing portable power during travel or remote work
• Maintaining a backup battery for uninterrupted productivity

Key specifications

• Battery type: Lithium-ion (Li-ion), 3 cells
• Voltage: 11.1 V nominal
• Capacity: 2600 mAh nominal
• Intended use: Notebook/laptop internal battery replacement
• Form factor: Designed to match original OEM physical dimensions and connector layout

How to use

Power off the laptop and disconnect the AC adapter before replacing the battery. Remove the original battery according to the laptop manufacturer’s instructions, align the replacement unit so the connectors and locking tabs match, then press into place until it is secured. After installation, connect the AC adapter and allow the battery to charge fully before first regular use to ensure proper calibration with the notebook's battery management system. Follow Lenovo’s guidelines for safe handling and disposal.

Recommendations

Use the battery with compatible Lenovo notebook models only. Avoid exposure to extreme temperatures, physical shock or moisture. Charge and store the battery at moderate temperatures and follow manufacturer recommendations for calibration cycles and end-of-life disposal. Do not attempt to open or puncture the battery pack.