HP ProBook 640 G1 Laptop Battery Replacement (CI03 / HSTNN-PB6K Series)

This HP 640 G1 battery is a reliable replacement designed to restore original battery performance for HP ProBook 640 G1 series laptops. It is fully compatible with the CI03 / CI03XL battery family commonly used across HP 640 G1 and related G1 business models such as 645 G1, 650 G1, and 655 G1. 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 general productivity use. The battery is designed as an internal removable unit, making installation straightforward. It includes essential safety protections such as overcharge, over-discharge, and short circuit protection to ensure safe and reliable operation.