kLite Bikepacker Ultra Review (s)

You can see the original review at SevenDayCyclist

The K-Lite Bikepacker Ultra Dynamo Light produces a maximum of 1300lumens at 17mph and comes in both road/gravel and Snow/MTB versions. I've been lucky enough to play with both and frankly, they're like having a premium quality 1300lumen light with unlimited run times. Fully water and shockproof, they're phenomenally rugged, too. 
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Pros: Beautiful build quality throughout , phenomenal performance.
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Cons: Completely sealed, non-serviceable components. However reckoned to last ten years.

https://www.sevendaycyclist.com/k-lite-bikepacker-ultra-dynamo-ligh