Zebralight W51
You probably mean H51, or H51w. The H53 series is the current equivalent.
I think OP wants something with a little more power. Zebralight has a suitable offering in the SC700d HI. It is, by all accounts excellent, and it is priced accordingly.
I’m disappointed in Sofirn for not making the battery in their bike light field-replaceable without tools. They’re a real flashlight company. They know how to do this.