Internal lithium-ion battery Lenovo 5B11M90076 11.1V 4400mAh for compatible Lenovo laptops

Replacement internal lithium-ion battery for compatible Lenovo laptops with a nominal voltage of 11.1V and a capacity of 4400mAh. This internal battery is designed to replace worn or failing cells and restore portable runtime for everyday mobile work, study, and travel. It is intended for installation inside supported Lenovo notebook models following the device manufacturer's disassembly and safety instructions.

Advantages

The battery delivers a stable nominal voltage of 11.1V and a 4400mAh capacity that supports typical laptop power needs without introducing additional external modules. As an internal rechargeable lithium-ion unit, it maintains consistent discharge characteristics and supports standard charging circuits used in compatible Lenovo notebooks. The compact form factor fits inside the laptop chassis and helps return the device to original operating time between charges.

Suitable for

• Replacing degraded internal batteries in compatible Lenovo laptops
• Restoring battery runtime for mobile work, remote study, and travel
• Servicing devices used for office tasks, web browsing, and multimedia playback

Key specifications

• Battery chemistry: lithium-ion
• Nominal voltage: 11.1 V
• Rated capacity: 4400 mAh
• Form factor: internal, designed for laptop installation
• Rechargeable: yes, compatible with standard laptop charging systems
• Intended use: replacement for compatible notebook models to restore runtime

How to use

Power down the laptop, disconnect all cables and remove any external power source before beginning replacement. Open the device according to the manufacturer's service instructions to access the internal battery compartment. Remove the old battery carefully, disconnecting its connector from the motherboard, and install the replacement unit in the same orientation. Reconnect the battery connector, reassemble the device and perform an initial full charge before normal use. Follow all safety and electrostatic discharge precautions during handling.

Recommendations

Use the replacement battery only in supported Lenovo laptop models and with the original or manufacturer-recommended chargers. Avoid exposing the battery to high temperatures, moisture, or mechanical shock. For optimal lifespan, perform regular charge cycles and avoid deep discharges; if unsure about compatibility or the replacement procedure, consult the device service manual or a qualified technician.