Dead Ryobi Battery? Read its manufacture date from the serial number and get it replaced for free.

The date of manufacture of Ryobi batteries is encoded in the serial number's first four digits. The 3-year factory warranty starts to run-out on the date of its manufacture, but your purchase warranty doesn't begin until the day you buy it.
This video will show you how to decode the serial number, how to test the battery to prove to Ryobi that it’s defective, and how to get your battery replaced with or without your original receipt for free.