The HP SS03XL is a premium internal lithium-ion replacement battery specifically engineered for the HP The HP SS03XL is a premium internal lithium-ion replacement battery specifically engineered for the HP EliteBook 840 G5 and its generation of business laptops. Designed to restore your laptop's original portability, it offers a high energy density for reliable performance during mobile generation of business laptops. Designed to restore your laptop's original portability, it offers a high energy density for reliable performance during mobile