Factory direct CS03XL replacement battery for HP Elitebook 745/840 G3/G4 laptops. Premium Li-ion cells ensure 500+ charge cycles with zero memory effect. Precision-molded ABS casing with flame-retardant coating for ultimate safety. Built-in circuit protection against overcharge/overheat. Seamless compatibility with HP power management software. Ideal for business travelers, remote workers, and IT professionals needing reliable all-day power. Ships with anti-static packaging and comes pre-charged for immediate use.