If the battery runs out excessively quickly, you can certainly send it in under warranty. Of course, if the extension goes to 5 years, the battery will no longer have 100% power and will not be treated as a warranty.
The Monteer 6500 is not a lamp for road traffic. The thing is incredibly bright at the top level.
But next to the road, this thing is amazing. Tip: always unite the head first, then the lamp.