Dewalt Univolt battery, DW9046, 7.2-volt Dewalt battery, Univolt 7.2-volt battery.

Replacement Dewalt and Black & Decker Univolt 7.2-volt batteries, this battery will fit all the Black & Decker and Dewalt Univolt 7.2-volt tools including the DW9046 and others

The Univolt replacement battery for 7.2-volt cordless power tools has a chemistry of Ni-CD and a storage capacity of 2000 milliamp hours or 2ah, it will fit all the tools in the Dewalt and Black & Decker range

My Ah rating appears to be different, can i still use yours?

The Ah or Amp hour Rating is the storage (or fuel) of the battery, the higher it is the longer the battery lasts between charges, bit like petrol in your car so a higher or lower one makes no different to the performance, just the length of time you can use the tool for.