The L20M4PC0 is a specific, internal lithium-ion battery designed for various Lenovo laptops, including models within the Lenovo Legion 5 and Ideapad Gaming 3 series. 

According to multiple sources and product listings, the L20M4PC0 battery has the following core specifications: 

The L20M4PC0 battery is compatible with several Lenovo models. It is crucial to verify the part number of your original battery before purchasing, as some laptop series have different compatible battery types (e.g., the 60Wh L20M4PC0 is not compatible with the 80Wh L20C4PC1 or 45Wh L20M3PC2). 

Compatible models include those in the Lenovo Legion 5-15ITH6H, 5-15ITH6, 5-15ACH6H, 5-15ACH6, and 5-15ACH6A series. It is also compatible with Lenovo Ideapad Gaming 3-15ACH6 and 3-15IHU6 series laptops. The L20M4PC0 can replace battery part numbers such as 5B11B48816, L20L4PC0, L20C4PC0, and L20D4PC0