This battery will only fit models that have 1 standard hard drive. If your laptop is equipped with 2 hard drives, or if you have an SSD in the extra bay area you must use the standard size M3800 battery as the extra hard drive uses the space that would otherwise accommodate this larger battery. You can check how many hard drives you have by going to your windows control panel area and select "Computer". In this area, The hard drives will be listed as Hard Disk Drives. Removeable storage devices would be your CD & DVD drives plus external hard drives. This is a brand new premium grade replacement battery. 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. 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 Dell 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 4 - 6 hours of run time with this Dell M3800 long run battery when new, depending on your energy use.

This battery replaces the Dell Precision Mobile M3800 Work Station and XPS 15 9530 laptop.