My original strap broke after many years of use. I ordered a replacement that was exactly like the original. Since I ride in the dark, I needed the Blitzu whenever I'm on a grocery run on a 3 wheel bike, so the strap was a necessity. I expect many years of use from the replacement.
I have tried many brands and types of bike light. But i keep coming back for more Blitzu390. I even buy them for my cousins!
The re light clip is better than the original. Very good.