This is a brand new Dell K875K battery for the Studio 14z, 14zn, 1440, 1440n, 1440z series.

The superior South Korean cells inside this Dell K875K battery cartridge 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 K875K battery replacement is typically superior to the original battery and is 100% compatible with your Dell Studio laptop computer. The battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 Year warranty.

Note: This K875K battery is rated at 11.1 Volts and is NOT COMPATIBLE with 14.4V or 14.8V. Not all computer batteries have the same capacity and run times. The higher capacity battery cells inside this cartridge have an energy capacity of 5100 mAh.