We recommend that when you buy a product you go to our web site and register under 'become a member'. Once you have registered, then you would go back to the home page and select 'register your product' and add any new tools to your tool box including the model number, date code, and serial number.
Keep in mind there is no corresponding serial numbers between included items such as batteries, chargers and the tool itself, as these may be produced at different times and in different factories, then subsequently assembled together. If you do not want to register on line you can record that information in a personal file that you can save on your computer and retrieve if needed. The product registration on line is not used for warranty purposes. It is a way for you to keep a record of the tools you have, old and new, and the information on them in case the tool gets stolen or destroyed in a fire, flood, etc.