I have always snickered at the suggestion to buy X brand high price helmet over that of X brand lower price WHEN it was a known fact that each had the very same lens within the helmet itself...yes....this I proved long ago buy visiting, comparing and writing down model number of the electronic lens....the best thing to do here and I have not looked for years is to find one that may have external batteries that can be changed when found discharged....compared to having to charge in the sun or battery change via an invasive technique or buy yet another helmet. I have three helmets here and one is at minimum 15 years old and is yet the better of the three...still original batteries and yet works yet this day.