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Specifications: Battery type: Li-ion. Color: Black. Voltage: 15.44V. Capacity: 80Wh. New from manufacturer. Up to 500 recharge cycles. Compatible Part Numbers: L22B4PC0, SB11N45431, 5B11N45420, 5B11K38949, L22C4PC0, SB11N45405, 5B11N45395, 5B11K38955, L22D4PC0, SB11N45409, 5B11N45428, 5B11K38961, L22M4PC0, SB11N45408, 5B11N45419, 5B11K38959, L22X4PC0, SB11N45400, 5B11N45439, 5B11K38953, 41CP4/62/141. Compatible with Laptop Models: Replacement for Lenovo ThinkBook 16p G4 IRH (Type: 21J8) Series; Replacement for Legion Pro 5 16ARX8 Series; Replacement for Lenovo Legion Pro 5 16IRX8 (Type: 82WK) Series; Replacement for Lenovo Legion Pro 5 16IRX9 (Type 83DF) Series; Replacement for Lenovo Legion Pro 7 16ARX8H (Type: 82WS) Series; Replacement for Lenovo Legion Pro 7 16IRX8 (Type: 82WR) Series; Replacement for Lenovo Legion Pro 7 16IRX8H (Type: 82WQ) Series; Replacement for Lenovo Legion Pro 7 16IRX9H (Type 83DE) Series. Note: If the new battery is not recognized during initial installation, please reinstall and check if the interface is fully connected. Discharge the new battery to 10-20% (not 0%), then charge and cycle 3-4 times to activate it