This is a brand new HP Pavilion F4809A battery for the Compaq Presario 1100 and 2100. It is also compatible with the HP OmniBook xe4400, xe4500, HP Pavilion ze4000, ze4100, ze4200, ze4300, ze4400, ze4500, ze4600, ze5000, ze5100, ze5200, ze5300, ze5400, ze5500, ze5600, ze5700 and NX9000, NX9010, NX9020, NX9030, NX9040, NX9050 laptops.

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 F4809A battery replacement is typically superior to the original battery and is 100% compatible with your HP Pavilion 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 hours to 2-1/2 hours of run time with this HP F4809A 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 & 4800 mAh capacities while providing up to 20% more run time