The HP HS04 battery is a 14.6V, 2600mAh (or 38Wh) lithium-ion battery, which is a replacement for various HP laptops, particularly those in the 240 G4/G5, 250 G4/G5, and Pavilion 14/15 series. It is designed to be used with your original laptop's charger and is a high-quality replacement option that meets safety standards.