41Wh lithium-ion battery for

The Dell 451-BCUI is an internal laptop battery for powering a compatible Dell notebook. Its primary part number is G91J0, which helps identify the replacement for repair work.

It uses lithium-polymer technology and has 3 cells. The stated capacity is 41 Wh (3640 mAh), with an output voltage of 11.25 V; these figures specify the battery configuration to match when replacing it.