This is a brand new Asus K52N replacement battery. This battery ships fully tested and ready to go. This battery is compatible with all versions of Windows including Windows XP, Windows Vista & Windows 7.

Inside the Asus K52N battery are South Korea's best Lithium-ion rechargeable battery cells. The superior battery cells will provide longer run times between charges as well as a longer service life than cheaper batteries. In addition, Li-ion batteries are not subject to the memory effect common with older battery technology. This means you can recharge your laptop any time without diminishing your battery capacity. This laptop battery replacement is typically superior to the original battery and is 100% compatible with your Asus K52N notebook computer. The battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 Year warranty.

You can expect about 2 - 2.5 hours of run time with this Asus K52N battery when new, depending on your energy use. The battery cells inside this cartridge have an energy capacity of 4400 mAh. This battery will be compatible with batteries rated at 4800 & 5200 mAh capacities.