HP EliteBook 840 G4 Laptop Battery Replacement (TA03XL / CS03XL Series)

This HP 840 G4 TA03XL battery is a reliable replacement designed to restore original performance and battery life for HP EliteBook 840 G4 series laptops. It is fully compatible with the TA03XL / CS03XL battery platform commonly used across EliteBook 745, 755, 840, 848, and 850 G4 models. Built with high-quality lithium-ion cells, it delivers stable 11.55V output and consistent runtime for everyday business tasks such as office work, browsing, and productivity applications. 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.