Dell Battery 3Cell 11.4V 3500mAh 42Wh

The Dell 9W9MX is a lithium-ion replacement battery for compatible Dell notebooks, intended to restore their power source when a battery needs replacing.

Its 42 Wh energy capacity and three cells identify this variant. Dell lists compatibility with Latitude 7280, 7290, 7380, 7390, 7480 and 7490, so it can serve as a replacement in those notebook models.

Installation requires removing the computer’s back cover. Refer to the service manual for the specific system for instructions on removing and installing the battery.