Buck driver?
Appears to be. You can see the runtime graph on turbo at 3:36
I see stabilized output only.
What other driver gives stabilized output apart from a boost driver? Nothing else I’ve seen drops off like that. It behaves exactly the same as the L21B and M21E that both use buck drivers
It can be linear driver. And i pretty sure it is. Kind off
Damn it, I’m still learning and thought the flat output like that meant boost or buck. Oh well, I’m not going to re-upload the video, but I will leave a comment.
I pulled the driver out and it’s not buck?
Thank you for bringing this to my attention
It is linear driver like in anothers Convoy lights. Also battery charger seems to be also linear charger with TP4056 ICs. Also M21E use boost driver not buck if it with XHP70.2. Also charger inside M21E is not linear I think.
Thank you for review. 
Thank you. I reviewed the SFT40 version of the M21E, so most likely got that wrong too. I’ll have to make sure I open them up first to confirm.
Always great to learn something new
Excellent review!
Thank you for the review, I wanted to buy the H1 but avoided due to the lack of regulated output - seeing the H2 has regulation is great. I’m going to buy one as soon as the store reopens after the CNY.
H1 now has regulated output as well. The driver was recently updated, shortly before H2’s release. I’m currently runtime testing one with a 219B SW35.
Interesting thanks, hope to see your review.
You shall!
I’m currently considering the H1 vs H2. H1 seems attractive because it’s smaller, lighter, and potentially more water-resistant—no charging port or rubber flap, which also simplifies modding or repairs. Unfortunately, it doesn’t come with the B35AM or a buck/boost driver, only the 5A linear driver.
I was previously advised to avoid linear drivers due to their inefficiency, but you mentioned that the H1 has a “regulated” driver now. Is that significantly better than the older linear one? And how does it compare in practice to something like the 2.2A boost driver in the H2?
I also noticed Simon offers the H1 pre-installed with a 60° TIR lens, but I’d prefer to get the glass + reflector version and add a TIR separately to keep my options open. I’m wondering, though—I believe TIR setup needs a copper shim for proper spacing, and the reflector version might not include this. Since you’ve taken yours apart, could you clarify if that’s the case?
On a related note, I read your review (great work by the way!) and saw Nick’s comment about fitting a 2mm tall magnet under the tail spring for a clean mod. Do you know if that actually works well, and what diameter that magnet should be? I assume it has to be smaller than the 25mm tail magnet Simon sells.
Lastly, do you happen to know if the 219 LED option still offered by Simon is the 219B variant? I realize those are discontinued now, but if he still has some stock, I’d definitely be interested in that setup.
Thanks again for your time—your insights are really valuable to flashlight geeks like me trying to get it right on a budget!
There are no TIR optics for H1. Host not comparable with any known TIR. MPCB have no screws so you have to press it properly. I dont know how Simon installing TIR. Probably pressing with fat silicon gasket. This is a disappointing design flaw… “Skilhunt” 17mm TIR is too short. You have to use 2 layers of MPCBs to rise led.
Me too and end it up by creating new driver. It took years and it was no so budget.
2 Thanks
Probably a TIR with a holder underneath the glass, same as on S21E. Not sure though.
1 Thank
Nope. Diameter should be 17mm. To do it properly you have to solder 2 mpcbs.
Even with the glass? Ew. That’s not a pretty solution 
Then again, lumintop put a 3mm thick MCPCB into the FWAA instead of just making the bezel 1.4mm shorter. Would not be the jankiest stuff I’ve seen in production.