The Unofficial DongDongHai(DDH) info thread and the Dongers lounge ;)

-06Apr2026
Moved table of bigger lights to #2 post for better navigation, added XBY driver info
Press here for big Dongs :smiling_face_with_sunglasses:

In an attempt to convert more Dongers I’ve integrated the details and specs of some DongDongHai(DDH) host available on Taobao, into one table. Hope this helps for fellow DIYers.

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Host model Head Ø Reflector composition MCPCB Ø Driver Ø Battery tube Ø Overall length Host weight Available colour Remarks
M1C /KD Ø34.8mm Ø28x20mm, 9/10mm opening 20mm 22mm, tail switch 27.8mm(21700) 149mm 141g Silver/Black Integrated 3A charging in tube
M2C /KD Ø40mm Ø35x20mm, 7/9/10mm opening 20/25mm 22mm, tail switch 27.5mm(21700) 150mm 172g Silver/Black Integrated 3A charging in tube
M2C(Triple) /KD Ø40mm Ø35x20mm, 3-emitters(3535/5050) 25mm(3P) 22mm, tail switch 27.5mm(21700) 150mm 172g Silver/Black Integrated 3A charging in tube
M4B Ø60mm Ø55x40mm, 10/16.5mm opening 32mm 32mm, side switch 30mm(21700) 165mm 319g Black Integrated 3A charging in tube
M4C Ø60mm Ø55x40mm, 10/16.5mm opening 32mm 32mm, side switch 30mm(21700) 158mm 319g Silver/Black USB-C
M4C(Quad) Ø60mm Ø55x40mm, 4-emitters(5050) 32mm(4x5050) 32mm, side switch 30mm(21700) 158mm 319g Silver USB-C
M8A Ø65mm Ø60x20mm, 8-emitter(5050) 50mm(8x5050) 32mm, side switch 30mm(21700) 218mm 373g Black Integrated 3A charging in tube

M1C


M2C


M4B/C



M8A



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Host model Head Ø Reflector composition MCPCB Driver Battery tube Ø Overall length Host weight Available colour Remarks
D2GC Ø45mm Ø42x32mm, 10mm opening 20mm 22mm, side switch 28mm(21700) 150mm Not specified Silver/Black Integrated 3A charging in tube
D2i /KD Ø45mm Ø42x32mm, 10mm opening 20mm 22mm, tail switch 33mm(26650) 161mm 230g Silver/Black Integrated 3A charging in tube
D2iC Ø45mm Ø42x32mm, 10mm opening 20/25mm 32mm, side switch 32.7mm(26650) 150mm 219g Black USB-C Port, 26800 extension
D4i Ø60mm Ø55x40mm, 10/16.5mm opening 20/32mm 22mm, tail switch 32mm(26650) 176mm 328g Black Integrated 3A charging in tube
D4i Ø60mm Ø55x40mm, 4-emitters(5050) 32mm 22mm, tail switch 32mm(26650) 176mm 328g Black Integrated 3A charging in tube
D5F Ø64.5mm Ø60x50mm, 10/16.5mm opening 32mm 32mm, side switch 34.5mm(26650) 175mm 395g Black USB-C Port, 26800 extension

D2GC/D2i/D2iC



D4i


D5F



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Host model Head Ø Reflector composition MCPCB Driver Battery tube Ø Overall length Host weight Available colour Remarks
D6E Ø65mm Ø60x50mm, 10/16.5mm opening 32mm 47mm, side switch 53mm(46950) 195mm 541g Black USB-C, 3x21700/46120 tube avail.
D7E Ø65mm Ø60x33mm, 3-emitters(5050 PCB) 50mm 47mm, side switch 53mm(46950) 180mm 530g Black USB-C, 3x21700/46120 tube avail.
D7F Ø65mm Ø60x33mm, 3-emitters(7070 PCB) 50mm 47mm, side switch 53mm(46950) 180mm 530g Black USB-C, 3x21700/46120 tube avail.
D8D Ø85mm Ø80x70mm, 10/16.5/23mm opening 32/50mm 47mm, side switch 53mm(46950) 218mm 769g Black USB-C, 3x21700/46120 tube avail.
F8B(?) Ø85mm Ø80x23mm, 8-emitters(7070) 60mm(8x7070) 47mm, side switch 53mm(46950) 198mm 845g Black USB-C, 3x21700/46120 tube avail.

D6E


D7E/F



D7F with 3x21700 tube

D8D


F8B


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Driver options

Diameter Ø Output Ramping Stepped Thermal Stepdown USB-C Charging PowerBank Fuction Remarks
XBY 32mm e-switch Ø32mm 16A Buck +120A FET 0.5-16A 1/1.5/2.5/4.5/7.5/12A Yes 22.5W Yes Turbo limit mode(20/25/30A Buck)
XBY 47mm e-switch Ø47mm 30A Buck +300A FET 0.5-30A Yes 22.5W Yes Fan Controller(5-12v configurable)

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My collection so far,

From Left to Right:
(Convoy)S21G/M21H/M21F/M21C
(DDH)-M4C/D7F/D6E

“Dong the DayDream triple 110” :smiling_face_with_sunglasses:


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My DDH collection so far:
Left to Right - DDH-D2G, DDH-M4B(with optional dual 21700 tube), DDH-D2GC

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Thanks for creating this topic with all the different models/information listed!

There are several models which I would really like to do a build with and I’m sure I will probably do so at one point! (If it was a bit “easier” to buy it somewhere, other than Taobao, I would’ve probably already ordered one or two DDH hosts.)

Due to this topic and the photos that you’ve also included, I noticed that several of the models you listed, I’ve came across at Kaidomain’s website, listed as hosts.

The M1C, M2C and M2C(Triple), listed as K1C, K2C and K2C-T:

Kaidomain also lists the K2G, which doesn’t line up exactly to your list, although I expect it might be the D2GC, although the specs listed of both models might not be fully correct somewhere.

They also list one 26650 host, which seems to be the same as the D2i:

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Based on @INeedMoreLumens his photo shown above, the K2G must obviously be the D2G and not the D2CG that I mentioned. As far as I could could tell, the D2G isn’t yet listed in the opening post.

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Yes, I agree.
The D2G is the mechanical switch version.
The D2GC is the eSwich version.

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Donger… I love it. I have 3 DDH lights and 3 more arriving from KAI hopefully soon. BOOKMARKED! Thanks for this. Hopefully spare parts will be easier to find. I did reach out to KAI Domain and they offered to try and source any DDH host if I just gave them the info.

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The D6/D7/D8/F8 have multiple battery tube options:

TaoBao Link: https://e.tb.cn/h.ijmyTHbe8lqAPJK?tk=1cY55X869RV

46950/46120/2x 46950/3x 21700:



Optional 3x 21700 carrier for 46950 tube:





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F8A with different battery tubes:

46950:

46120:

3x21700:

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Thanks for the info! Will link to the table accordingly

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Sir, it is not polite to post pics of your Dong on the internet. :innocent:

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Well you’ve got me excited now. Can some of you post some links to the elusive 46120 44,000 mah batteries?

I really like that those lights are being supported with all those optional batteries tubes, making it so that you can even further ‘customize’ your build to your liking!

I know that you only got your DDH-D2G 7 days ago, but do you already have plans which LED you’re going to into it?

I’m probably going to order the Kaidomain version (K2G) in the next couple of days, just because that’s a quick and easy option.
After that I will orientate myself on one of the bigger lights (on Taobao), like the M4B (or C) or maybe even the D6E.

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You’re welcome

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Definitely, the M4C and D6E are very good host.

I’m glad to see the growing Dong community :innocent:

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I installed a SFT42R 5000K and a Convoy 22mm 10A Buck driver.

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For D6/D7/D8/F8, there were two 47mm drivers I tried.

The Anduril 10A buck/120A FET is not bad, but the USB-C port is a placeholder part and not meant to actually function. You need the charging cap for the battery tube with it:

The XBY 30A buck/300A FET (v3.5k, not the older v2.5 FET only) has working USB-C and obviously more current than the Anduril driver, is click for off but custom UI:

There is a 32mm XBY buck/FET driver for the M4/D5/etc. as well with click for off custom UI.

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Sounds like a nice combination for that light. Dimensions of the reflector appear to be pretty close to ‘regular’ C8(+) reflector, but how does the beam turn out in practice?

I just spotted in this topic, that Simon is working on 2 new LEDs, the F45R and F150R, with that last one being a 7070, round die/LES capable of max. 30 amps. Given that the D2G has a 10mm reflector hole, 7070 should work.

Might be a fun combination putting that LED in the D2G, combined with a 20a buck driver.

I like both for having the option of a reflector with a 16,5mm reflector hole, giving it the option to go for the bigger LEDs like the SFH55 and SFP55. The 46950 battery tube option for the D6E makes it even more interesting, since I have a bunch of those batteries in stock/storages, without a purpose for them currently.

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This is going to go slightly off topic so I’ll try to put everything into one post.

The reflectors are interchangeable with the Convoy C8,C8+,M21A, and MantaRay M45.

My D2GC/XM-MR has a SMO 10mm hole DDH reflector.
The beam looks good but when white wall hunting it does have a ring beyond the far outside edge of the beam.
I’m guessing that ring is caused by the SS Bezel.

When I ordered my D2G, the only reflector option was OP.
I swapped in a 7mm hole SMO I stole from my MantaRay M45

My D2G/SFT42R with the MantaRay reflector has some additional rings in the corona.
I’m planning to swap the 10mm SMO reflector into it to see if it’s the reflector causing them, or the LED.

I’ll let you know the results after I have a chance to swap the reflectors.

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