The product is a brand new sealed NiMH battery pack for the HP OmniBook 300 laptop. This Ultra RARE battery pack is specifically designed for HP laptops and contains 4 black battery cells. The DC battery type ensures long-lasting power for your device, making it an essential accessory for those who require reliable and efficient performance from their HP laptop. Great for HP Omnibook 300,425, 430 and 530collectors that look for this battery which is no longer produced. Save your precious time and frustration for trying to recharge those old Omnibook 300 battery and hope it works. This brand new battey has never been charge so you will have a lots of charging cycle remain for its life. Add this to your collection. ASIS . NO RETURN. HP Omnibook laptops are no included in the listing and sale, just for demostration purpose only.