That part was the reason to create a hub dynamo

Expensive without charme large I have had in this product, unfortunately I was so unnerved I (finally) have converted to hub dynamo my entire bike because I had finally tired of the battery number after a month.
The IXBACK never really worked right with me. It turned not one when needed, it turned off automatically if it should stay on and the light value is obviously better than that of an old standard rear light, but far from the B & M Toplight Line Plus now used.
Added to this was that BUMM when this light here used batteries LR1 form factor and this had to after only 2 months. Unfortunately no batteries are to get it, I think there would have been a little more size and placement by standard AAA batteries made more sense.

For me, a very weak product from the B & M home, at the suit made Alfine-Nady, Bumm LYT and BOOM Toplight plus now used is actually complete relaxation announced. Top setting and never have to worry again about light. It just works. Always and everywhere!