HP ProBook 4520s / 4320s / Compaq 620 Laptop Battery Replacement (PH06 / HSTNN-IB11 Series)

This HP 4520s / 4320s / 620 battery is a reliable replacement designed to restore original battery performance for HP ProBook 4000 series and Compaq business laptops. It is fully compatible with multiple models including HP 4520s, 4320s, and HP Compaq 620, and uses the widely known PH06 battery family. Built with high-quality lithium-ion cells, it delivers stable 10.8V output and consistent runtime for everyday computing tasks such as office work, browsing, and general productivity use. The battery is designed as a removable internal unit, making installation simple and fast. It includes essential safety protections such as overcharge, over-discharge, and short circuit protection to ensure safe and reliable operation.