Genuine L21L4P72 Laptop Battery for Lenovo ThinkPad T16 Gen 1/Gen 2 & ThinkPad P16s Gen 1 Series
Upgrade your productivity with the Genuine L21L4P72 Laptop Battery, engineered for perfect compatibility with Lenovo ThinkPad T16 Gen 1 / T16 Gen 2 and ThinkPad P16s Gen 1 mobile workstations. Featuring stable 15.44V output, a long-lasting 3400mAh capacity (52.5Wh), and high-quality 4-cell Li-ion power, this replacement battery delivers the reliability professionals need for business travel, engineering tasks, and all-day workflows.
Designed as a direct replacement for multiple Lenovo part numbers—L21L4P72, L21C4P72, L21D4P72, L21M4P73, L21D4P73, L21M4P74, and FRUs 5B10W51870 / 5B10W51871 / 5B10W51872 / 5B10W51873—it ensures seamless installation and OEM-level performance.
About this item
Voltage: 15.44V
Capacity: 3400mAh / 52.5Wh
Cell Type: Premium 4-cell Lithium-ion
Compatibility:
Lenovo ThinkPad T16 Gen 1 / Gen 2, ThinkPad P16s Gen 1Replaces Part Numbers:
L21L4P72, L21C4P72, L21D4P72, L21M4P73, L21D4P73, L21M4P74
FRU: 5B10W51870, 5B10W51871, 5B10W51872, 5B10W51873Stable Performance: Consistent power output with intelligent protection against over-voltage, overheating, and short-circuits
High Energy Efficiency: Delivers longer runtimes for heavy multitasking and professional workloads
Perfect Fit: 100% compatibility with original Lenovo system architecture
Compatible Models (use “Ctrl+F to find your model quickly”)
- Fit for Lenovo ThinkPad T16 Gen 1 2022 Series;
- Fit for Lenovo ThinkPad T16 Gen 2 2023 Series;
- Fit for Lenovo ThinkPad P16s Gen 1 2022 Series;
- Fit for Lenovo ThinkPad P16s Gen 2 2023 Series.
Replacement for Part Number:
L21D4P73,SB10W51974,5B10W51873,L21C4P72,SB10W51973,5B10W51872,L21M4P74,SB10W51972,5B10W51871,L21L4P72,SB10W51969,5B10W51868,L21D4P72,SB10W51971,5B10W51870,L21M4P73,SB10W51970,5B10W51869.











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