This is a brand new HP NZ375AA battery for the ProBook 17" 4720s. This NZ375AA battery fits flush with the bottom of the laptop. This NZ375AA Battery is compatible only with 14.4 and 14.8 volt systems. Check your battery for your current voltage rating to avoid a return.

This NZ375AA battery is 100% compatible with your HP ProBook 4720s notebook computer. Each battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 year warranty.

This NZ375AA battery is ONLY compatible with 14.4 volt or 14.8 volt systems. Check your current battery to ensure you are ordering the correct battery. It should match the picture above. If your battery is rated at 11.1 Volts or 10.8 volts, your battery can be found here: HP-A811. This high capacity battery will provide about 2 hours to 2-1/2 hours of run time with this computer battery when new, depending on your energy use. The higher capacity battery cells inside this cartridge have an energy capacity of 5200 mAh. This battery will be compatible with batteries rated at 4400 or 4800 mAh and 5200 mAh capacities while providing up to 25% more run time.