Original Lenovo ThinkPad X1 Extreme / P1 (Gen 1 & Gen 2) Laptop Battery 15.36V 80Wh L17M4P72 L18M4P71

Genuine OEM Replacement Battery for ThinkPad Performance Workstations

Restore your laptop's original battery runtimes with this factory-grade internal replacement lithium-polymer battery pack. Built specifically to power power-hungry configurations with dedicated graphics and dual-fan cooling setups, this genuine unit guarantees safe, optimized energy delivery without throttled performance.

Premium 80Wh High-Density 4-Cell Pool

Engineered with premium Grade-A cells that carry an authentic capacity of 5235mAh (80Wh) operating at a steady 15.36V output. The built-in smart circuit board handles safe integration with Lenovo firmware systems, supporting clean rapid-charging workflows while insulating your components from power spikes or over-charging loops.

⚠️ Device Generation Compatibility Warning:

This high-capacity battery is designed exclusively for the 1st Generation and 2nd Generation models of the ThinkPad X1 Extreme and ThinkPad P1 series. It is physically larger than standard batteries and will not fit slim-line profiles like the regular ThinkPad X1 Carbon or X1 Yoga. Please verify the part number on your existing battery before making your purchase.

Key Technical Specifications:

• Battery Model Code: L17M4P72 / L18M4P71 (Also interchanges with L17C4P72)

• Lenovo FRU / Substitute Part Numbers: 01AY969, 01AY968, 01YU911, SB10Q76929

• Battery Chemistry: Lithium-ion Polymer (Li-Po)

• Voltage Output: 15.36V DC

• Energy Capacity: 80Wh / 5235mAh

• Target Hardware Families: Lenovo ThinkPad X1 Extreme Gen 1 (Type 20MF, 20MG), X1 Extreme Gen 2 (Type 20QV, 20QW), ThinkPad P1 Gen 1 (Type 20MD, 20ME), and ThinkPad P1 Gen 2 (Type 20QT, 20QU).