Some cheap but very bright Chinese light and a random bike brand rear light.
Here’s why I couldn’t stand it: I had to charge them constantly. They drained batteries quickly in the cold. They were fiddle to mount, and I was mounting and denounting them constantly. They had shitty conical beams. I lost their parts pretty frequently. I had to ride home with very dim lights more than I’d like.
Vs a dynamo stop which is always there, always on, never runs out batteries, is mounted once and never touched for years, has a nice beam that lights up more of the road more evenly. I never have to worry about them getting stolen.
I think battery lights are probably ok for certain bikes that rarely ridden at night, or high performance bikes or whatever. But for general purpose or even 95% of all bikes, dynamos are way better objectively.
Edit: also the battery was separate from the light which I really hated too. Mainly I hate the lights I bought but I never want to ride at night with battery lights again.