The Samsung Galaxy Book Flex Laptop Battery - High Capacity is a replacement battery designed for the Samsung Galaxy Book Flex series laptops. It has a voltage of 15.4V and a capacity of 66.9Wh/4350mAh/4-Cell. The battery is compatible with the AA-PBRN4ZU 4ICP5/52/109 model and is suitable for use with the Samsung Galaxy Book Flex 930QCG, 930QCJ, 930XCJ, NP930QCG, NP930QCG-K01, 950QCG, 950QCG-X01, 950QCG-X03, 950QCJ, 950XCJ, NP950QCG-X01, and NP950QCG-K01US models.This high-quality battery features Grade A cells that help to mitigate the risk of battery leakage and maximize output stability. It also has built-in circuit protection for enhanced safety and extended battery life. The battery is brand new and made of lithium-ion, ensuring reliable performance. Here are some key features of the Samsung Galaxy Book Flex Laptop Battery - High Capacity:- Voltage: 15.4V- Capacity: 66.9Wh/4350mAh/4-Cell- Compatible with AA-PBRN4ZU 4ICP5/52/109 model- Grade A cells for improved safety and stability- Built-in circuit protection for extended battery lifePlease note that for the initial installation, it is recommended to reinstall and check the interface fully connected, discharge the battery to 5% (not to 0%) and then charge to 95%, and cycle 3-4 times. Overall, the Samsung Galaxy Book Flex Laptop Battery - High Capacity is a reliable replacement battery that offers high performance and durability. It is the perfect choice for those in need of a new battery for their Samsung Galaxy Book Flex laptop.