Lenovo Internal 4-Cell 86Wh Li-Ion Battery (5B11M90038)

This Lenovo internal battery delivers a substantial 86 watt-hours in a four-cell design, giving compatible ThinkPad P1 and X1 Extreme models extended runtime without adding bulk. The 15.36 V lithium-ion chemistry is rated at 5600 mAh, making it a direct replacement for the original part.

Highlights

• 86 Wh energy capacity for long work sessions
• 4-cell lithium-ion construction
• 15.36 V nominal voltage, 5600 mAh
• Built-in protection against overcharge, over-discharge, over-current, short-circuit, and temperature extremes

In daily use

Because it installs internally, this battery keeps the laptop's slim profile intact. It is rechargeable and intended for users comfortable with opening the chassis or professional service. The black housing matches the original component.

Full specifications

• Battery type: Internal laptop battery
• Battery chemistry: Lithium-Ion (Li-Ion)
• Number of cells: 4
• Energy capacity: 86 Wh
• Nominal voltage: 15.36 V
• Amperage capacity: 5600 mAh (5.6 Ah)
• Rechargeable: Yes
• Product colour: Black
• Compatible series: Lenovo ThinkPad P1 Gen 4, P1 Gen 5, P1 Gen 6, X1 Extreme Gen 4, X1 Extreme Gen 5, X1 Extreme Gen 6

Final note

When replacing an internal battery, follow the manufacturer's service manual and disconnect all power sources before starting.