Dell 019K7 is a 3-cell lithium-ion battery for compatible Dell laptops, listed with 55 Wh capacity. It is a replacement power source for supported Dell Pro systems, suited to mobile work when a charged laptop battery is needed away from a desk.
The listing identifies Dell Pro Plus PB13250, PB13255, PB14250, PB14255, PB16250 and PB16255, as well as Dell Pro PC14250, PC14255, PC16250 and PC16255, as compatible models. The 3-cell lithium-ion design and stated capacity describe the battery’s construction and stored energy.