Battery for Lenovo laptops 5B10W51863 — Lithium-Ion 52.5Wh / 3400 mAh, internal, black

Replacement internal laptop battery compatible with Lenovo notebooks. This Lithium‑Ion battery provides 52.5Wh nominal energy and 3400 mAh capacity in a black enclosure, intended as an internal spare to restore operating time and replace worn or degraded cells in compatible models.

Advantages

The Lithium‑Ion chemistry offers a balance of energy density and weight suitable for portable devices, delivering stable voltage and predictable discharge characteristics. The internal design fits into the notebook chassis without altering the external profile, and the black finish matches many Lenovo models. Using an original-compatible internal battery can restore battery runtime and improve the device’s mobility when the previous pack no longer holds sufficient charge.

Suitable for

• Replacing a depleted or failing internal battery in compatible Lenovo laptops
• Restoring mobile runtime for everyday office and web browsing tasks
• Repair and refurbishment of used Lenovo notebooks

Key specifications

• Battery technology: Lithium‑Ion (Li‑Ion)
• Nominal energy: 52.5 Wh
• Capacity: 3400 mAh
• Mounting: internal laptop battery form factor
• Colour: black

How to use

Power down the laptop and disconnect it from any external power source. Remove the device’s access panel or back cover according to the manufacturer service instructions, then unplug and remove the depleted battery. Install the replacement internal battery in the same orientation, reconnect the battery connector securely, reassemble the laptop and charge the battery fully before normal use. Refer to the laptop’s service manual for model-specific disassembly and safety precautions.

Recommendations

For safe operation, use this Lithium‑Ion battery only in compatible Lenovo models and handle with care to avoid puncture or short circuits. Calibrate the battery by charging to full and then discharging to recommended levels occasionally, avoid prolonged storage at full charge or at very low states of charge, and store in a cool, dry place when not in use.