This a Craftsman 19.2 Volt EX battery. The model number is 1323517, it works with charger number 1425301 (7.2 Volt -24 Volt Fast charger). See compatibility chart below for details regarding which tools it will work with. There are a few other model numbers that are equivalent to this battery as well, you can see which ones in the chart done the page, it may help you finding a replacement battery. This is battery in short is compatible with all the 19.2 EX, C3, and diehard branded batteries, that are not lithium based, and all of them use the same charger. However, to be sure check the chart below. The chart below shows a lot of the compatible batteries tools and chargers, clicking the (B) symbol next to them will search for that item on ebay. This is quicker than manually searching for the item, as it will first try to find the model number in the title of the listing, if none are found it will then search the description of the listing, and display those results, so it should find it, if the seller put the model number anywhere in the listing. Thanks.