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Product Overview
Upgrade your HP EliteBook 840 G3 or G4 laptop with the genuine HP CS03XL rechargeable battery. Engineered to meet OEM specifications, this battery provides reliable long-term power and compatibility for seamless mobile computing.
Perfect for professionals, students, and business users, the CS03XL restores hours of effective usage to aging EliteBook laptops and select ZBook or Thin Client models.
Key Features
OEM-Level Compatibility — Official HP part number CS03XL, also known as HSTNN-IB6Y, compatible with EliteBook 840 G3, 848 G3, 850 G3, 745 G3, 755 G3, and Gen4 series, as well as HP ZBook 15u G3/G4 and mt42/mt43 Mobile.
Precise Voltage and Capacity — Rated at 14.4 V and 46 Wh capacity (~3820 mAh), providing approximately 5–8 hours of typical usage depending on workload and system configuration.
Reliable Lithium-Ion Chemistry — Built with high-quality Li-Ion cells that include overcharge, overheating, and short-circuit protection for safe and consistent performance.
Compact & Lightweight Design — Slim and easy to install, it preserves the lightweight portability of your EliteBook.
Installation & Compatibility
OTC Part Numbers: Compatible with many HP stock codes including 800231-271, 800231-141, CS03046XL, and HSTNN alternatives such as IB6Y, I33C, I41C, DB6U series.
Installation: Repairs typically completed in under 10 minutes—remove the old battery, slide in the CS03XL, and secure before powering up.
Performance Insights
When new, the CS03XL provides several hours of reliable runtime, depending on CPU load, screen brightness, and Wi-Fi usage.
Over time lithium batteries degrade; many users report 500–800 full charge cycles before capacity drops significantly