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The B01 is a bike headlamp but can be used as EDC as well.
I've been using a Lumintop B01 for about 4 weeks now. I bought it as a cheap bike headlamp but was fully blown away by it's build quality, size and the brightness of the light it emits. Besides using it purely as a bike flashlight I started using the B01 on other occasions, too.
Because I was so impressed by the B01 and curious about the new Lumintop D2, I ordered it as well. It just arrived yesterday. I purchased the version featuring the Nichia 4000K LED instead of the cooler toned Osram LED. Both, the B01 and D2 share the same metal body and size. The only differences between the two flashlight are different types of LEDs and different reflectors. Furthermore the size of the D2's battery tube can be changed for smaller batteries than 21700/18650.
The Lumintop web page states the following specs for the B01/D2:
Low: 10 Lumens (B01) / 15 Lumens (D2)
Medium: 250 Lumens / 270 Lumens
High: 450 Lumens / 550 Lumens
Turbo: 850 Lumens / 1000 Lumens
The user manuals I received with my B01 and D2 state different specs:
Low: 15 Lumens (B01) / 15 Lumens (D2)
Medium: 260 Lumens / 270 Lumens
High: 550 Lumens / 550 Lumens
Turbo: 900 Lumens / 1000 Lumens
As far as I know there are different versions of the B01: warmer/cooler tone, colors/blinking while charging, etc.
Because the B01 is constructed as a bike headlamp it features a reflector that cuts off the light in the upper part to avoid blinding other road users. This has pros and cons when using it for other occasions like walking the dog.
Sadly, I am not as happy about the D2 as I hoped to be. Of course, I know that I bought a thrower flashlight, but to my mind it would be nice if it was just a little bit more floody.
On the other hand, the downside of the B01 is that you can't see what's 15 meters in front of you when you point the light closer to you because of the reflector that cuts off the light to avoid blinding other road users.
The B01 does one thing, and it does it well. I use it as a headlamp on my electric skateboard, and as you stated, how it cuts off the upper portion of the beam makes it useless in any other regard, imo.
I don’t bike, so no use for B01, but I do have the D2 in Osram. A lot to like about the form factor. I find it very comfortable in hand and unobtrusive in a jacket pocket. Not the best tint if you’re white wall hunting, but unnoticeable to my eyes outdoors. It’s a great little short range thrower with decent enough spill on med/high modes to get about. The only thing keeping me from buying the Nichia version is that crappy UI. Hold for off is a deal breaker.
I’d only put my beloved B01 on non-bike use in the pinchiest of pinches. The beam is exceptional for a headlight, but subpar for a handheld torch.