Official Answer
Owners of a Norsk Lithium Evo-Tec On-Board Charger are encouraged to maintain the required documentation for warranty coverage or register their product for warranty coverage using one of the three methods described below:
Save a copy of your receipt showing the model and purchase date for submission to Norsk Lithium Customer Service in the event warranty coverage is needed.
Register the product for warranty online on the Norsk Lithium website by creating an account and filling out a Product Registration Form.
Owners that register their chargers online can check the status of their warranty registration at Registered Products Section under My Account.
Answered by Odin
TECH GOD!