Short Review of Sofirn SP33 v2 with XHP50.2

My v2 has a different tailspring than my original SP33. The old one was the full diameter of the tube. The new one is ~1/2 that. The length of the current path is shorter, as a result.

The point still stands about voltage drop, though.

Thank you all for answers. This is what i like about this forum, you ask something and you get a decent answer in no time! Thanks guys! That 26mm mcpcb would be great but i have never reflowed a led. Maybe i will try with 20mm XHP50.2.

The DQG 7x emitter 26650 definitely steps down. It’s actually very noticeable. Just try it. I wish Sofirn will get rid of the timed step downs on their newer lights that already have advance temperature regulation. I don’t want timed step downs especially when used in outdoor cold temperatures.

Driver pics are added to post 1.

Thanks for the driver photos!

It looks like it is using the TI TPS61088 boost converter.

Edit: And it looks like this is how an switch current limit is set.

There are other ways to do current limiting though, using an op-amp and the voltage feedback pin.

I have this light and for $20 it’s a bargain, 2400 real lumens and 1000 sustainable lumens, with great UI (click on click off)

The things I don’t like:

-Tint: it’s cool, a 5000k would be better
-Can’t go from moonlight to regular modes, you have to turn off the light and then turn on with a single click
-Can’t turn off from turbo, you need two clicks, first click gets you to previous mode and second click to turn off

Oh, i never noticed. I guess i only use turbo for short periods.
Trying it now.
Aha, yes it does step down after a minute or so.
Ooh, it’s hot !
But it doesn’t step down based on battery voltage or current or does it?
At least not as early as the SP33.

When you go to turbo from OFF it’s just one click to turn it off.

Awesome!
Thanks, Jason. :+1:

That’s very good to know !
Hopefully we can identify the resistor and replace it.

so who will slice the led? just ordered mine. usually shipping is pretty fast.

Switch mod.

.

Placed my order from their Aliexpress store Nov 14.
Tracking shows light was shipped Nov 26.
No updates since then. 30 days later and it hasn’t left China yet.

it is a busy time for the chinese and sometimes just bad luck i guess. my most recent sofirn took 11 days after they shipped it

If you don’t have updates, how do you know it’s still in China? My light took 27 days, but I ordered it a month before Thanksgiving. All deliveries are going to take longer during the holiday season (from about mid October to mid January). I had a 20 day gap of no updates. It seems yours got shipped 10 days after ordering, mine was 4 days after. I would guess you’ll probably see some updates in the next week or so. Once it hits the US, it can be delivered pretty quick. I wouldn’t stress too much about it.

Mine will be here today. 32 days.

When a package leaves China, the EPacket tracking shows it was sent to the USA.
When it arrives in the USA, USPS tracking shows it arrived.
Neither of those 2 things have happened, so I have no reason to believe the package has left China yet.

I have had packages arrive without ever getting any tracking info. That’s usually from dishonest Aliexpress vendors giving me a bogus tracking number to extend their shipping deadline.

My tracking went from “in transit in country”(China) to”arrived in NY” very quickly.
Seems to have missed a step or two.

Jason would you please give me a detail of side led mod

I need to do it over using a smd led. Parasitic drain is crazy high. I ordered some 3x3x2mm trim pots so I can easily adjust the brightness. I’ll post pictures when I redo it.