This is a brand new, premium grade replacement battery for Dell Precision M40 M50 Series brand laptop computers. The superior South Korean cells inside the battery cartridge will provide longer run times between charges as well as a longer service life than cheaper batteries.

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 for Dell Precision M40 M50 Series brand laptops and is 100% compatible. The battery is individually tested before shipment and backed by 30-day complete satisfaction guarantee, plus a 2 Year warranty.

You can expect about 2 hours to 3 hours of run time with this computer battery when new, depending on your energy use.

This battery replaces these batteries for Dell Precision M40 M50.

Laptop Battery Express only deals with brand new premium computer batteries. We never carry recycled or used batteries. We only use the highest quality cells inside the battery pack so you will have a long service life (300-500 recharge cycles). We do not use cheaper battery cells which can wear out in a little as 6 months. Our inventory turns rapidly and you will always receive a freshly manufactured battery.