HP EliteBook 840 G3 Laptop Battery Replacement (CS03XL / TA03XL Original Series)

This HP 840 G3 original battery (CS03XL / TA03XL series) is a reliable replacement designed to restore full performance and battery life for HP EliteBook 840 G3 laptops. It is widely used across G3 and G4 EliteBook business ultrabooks and is fully compatible with the CS03XL battery platform. Built with high-quality lithium-ion cells, it delivers stable 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.