Sofirn C8F host. 21700 C8F Available

same here thank you sofirn!

Hi Sofirn

I want to purchase a C8F 21700 from Aliexpress but am now concerned about this defective driver issue.
Can you advise if their stock is being checked/replaced/fixed ?

Thanks

Wow! What great customer service.

I’m happy with swapping the fet myself, but I appreciate sofrin looking to address the issue nonetheless. That’s awesome, as usual from them.

Another point worth noting is that I’m really happy with the ramping on this light. It’s much smoother and a good speed. Compared to the sp32a v1, I feel this light has much improved ramping.

It’s pretty close to the d4. Not quite narsil, but very close imho.

It’s getting more and more rare for companies to listen to customer feedback. Sofirn seems to be doing it right.

So what can we do about this giant retaining ring? Think i can grind it down at an angle on the inside edge to fit a driver with 7135 on the bottom?

Also mind the other side of the driver: the edge on which the driver rests is wide too and may touch driver traces and components.

I have a 20mm lexel driver so it might be ok on that side but this is a good point. Overly complicated driver shelf and Alu ring. Almost better to use 17mm and spacer

Sure.

Any suggestions for a 17mm constant current driver that works with an E-switch? I’m really interested in this host…

Use fet+1x7135 driver with no parts on spring side.

In such a nice host it’s a shame to not have more regulated output options.

20mm like this? FET + 7135 Driver - 20mm - MTN-20DDm

Mtn also has a 22mm board but then you would have to sand it I guess…

contactcr
Yes.

+1

Just a quick check. Does anybody know if it’s safe buying from AE official store at this point or is it likely I will still receive a light with a dodgy FET? Many thanks.

Ask them before ordering just in case.

Perhaps they will just strip the lights of the faulty driver and replace it, or they’ll just sell them as hosts.

Thanks. Just sent Sofirn a message to their AE store. Will update the thread as soon as I hear back from them.

BTW, does anyone know an EU store that stocks a nice/recommended driver plus a board with LEDs that would fit the host? Cheers.

Received a reply from Qidong Yang:
“Yes,the MOSFET problem has been solved already, the stock now has already improved”.
So it looks like it should be safe to order from AE.

Thanks for checking on this. I wonder when it will be “safe” to order from Amazon to ensure getting the corrected version.

I just got some new FETs from MTN today and swapped it out.

New and old.

I gained 2A more at the tail and 350 more lumens @30s. There is a more instant jump to Turbo as well. I left the stock led wires.

Apparently we need to wait a little bit longer for Amazon. I’ve asked on AE and just got the answer:
“The AMZ not yet, because of the new produce batch is still on its transfer way to USA”

Also they advised to check directly with Amazon for the latest updates.