HP EliteBook 840 G1 / 845 G1 / 850 G1 / 855 G1 / 840 G2 / 845 G2 / 850 G2 / 855 G2 / ZBook 15u G2 Series Laptop Battery Replacement (CM03XL / CO06XL Series)

This HP EliteBook 840/850 G1/G2 and ZBook 15u G2 battery is a reliable replacement designed to restore original performance for HP business ultrabooks. It is fully compatible with the CM03XL and CO06XL battery families widely used across G1 and G2 generations, including EliteBook 840, 845, 850, and 855 models. Built with high-quality lithium-ion cells, it delivers stable 11.1V–11.4V output and consistent runtime for office work, browsing, and professional productivity tasks. The battery is an internal slim type designed for ultrabook chassis and includes essential safety protections such as overcharge, over-discharge, and short circuit protection to ensure safe and long-lasting operation.