The first two digits of the serial number on the LabQuest 2 indicates the year of manufacture. For example, this LabQuest 2 was manufactured in 2013.
LabQuest 2 carries a 5-year limited warranty (one year on the battery). If you are having problems with a LabQuest 2 and it is older than five years, contact Vernier Tech Support to discuss. We still might be able to help you.