HP EliteBook 840 G1 / 845 G2 Laptop Battery Replacement (CM03XL / CO06XL Series)

This HP EliteBook 840 G1 / 845 G2 laptop battery is a reliable replacement designed to restore original performance and battery life for HP EliteBook 800 G1 and G2 series ultrabooks. It is fully compatible with the CM03XL and CO06XL battery families commonly used across 840, 845, 850, and 855 G1/G2 models, including ZBook 15u G2 variants. Built with high-quality lithium-ion cells, it delivers stable 11.1V–11.4V output and consistent runtime for office work, browsing, and professional use. 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.