HP EliteBook 820 G1 Laptop Battery Replacement (BT04XL / SB03XL Series)

This HP 820 G1 battery is a reliable replacement designed to restore original performance and battery life for HP EliteBook 820 G1 series laptops. It is fully compatible with both BT04XL and SB03XL battery families commonly used in this model range, including related EliteBook 725 G1 and 820 G2 variants. Built with high-quality lithium-ion cells, it delivers stable 11.1V–11.4V output and consistent runtime for everyday computing tasks such as office work, browsing, and business use. The battery is a removable internal unit and includes essential safety protections such as overcharge, over-discharge, and short circuit protection to ensure safe and long-lasting operation.