High-Capacity Replacement Battery for Lenovo ThinkPad P1 and X1 Extreme Mobile Workstations Restore your Lenovo ThinkPad P1 Gen 4-6 or X1 Extreme Gen 4-5 to optimal performance with this premium 90Wh Li-ion replacement battery. Specifically engineered for high-performance mobile workstations, this L20M4P75 compatible battery delivers reliable power for demanding professional applications with stable 15.52V output and high-capacity 5805mAh in a robust 4-cell design. Perfect for creative professionals, engineers, and power users requiring maximum performance.