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frank9755
What about a Lumintop B01? Cut off beam (but not stzvo) and replaceable 21700 batteries. 5h on high (550 lumens) and then just swap batteries. The mount looks bulky but actually works really well (including offroad). Also usb-c charging and can be run off a usb powerbank.
I wanted to ride my fast(er) bike on LEL but didn't want to build a carbon dynamo wheel. So I took one of these and 5 21700 batteries. Worked great. Now it's used for before work rides in the Lakes. Thou if you're into retina burning, lots of lumens white led light, it's not that.
https://www.aliexpress.com/item/33046014882.html?spm=a2g0o.productlist.main.1.5ba64bdcHg6R6L&algo_pvid=de109f3d-8698-47e4-87f5-e050884c6cf5&algo_exp_id=de109f3d-8698-47e4-87f5-e050884c6cf5-0&pdp_npi=4%40dis%21USD%2153.99%2131.85%21%21%2153.99%21%21%4021038dfc17011779696967127eedd4%2112000029659885148%21sea%21UK%21185278415%21&curPageLogUid=HxlHRxpSAwcq
And good quality 21700 batteries from Torchy the Battery Boy: https://www.torchy.co.uk/product-category/21700-batteries/
I think Fenix make a replaceable battery bike light but the batteries might be proprietary.
Other ones I've seen mentioned but never used are the ENFITNIX Navi800 and ToWild BR800 (both use small capacity 18650 batteries thou).