A similar product is Magic Fox PD180: 京东(JD.COM)-正品低价、品质保障、配送及时、轻松购物！ (out of stock right now).
One of the reviews has a photo of the PCB:
From the description it looks like the WITRN unit doesn’t have boost capability, so you’d need ~21v DC input to get 100w USB-C.
Hi, HKJ - I was wondering if you might review the new XTAR PB2S powerbank with replaceable 18650 / 21700 cells?
https://www.aliexpress.com/item/4000107760986.html
I got it from Xtar and the review is nearly finished,
Thank you 
Yesssss… Yeahhh… Thanks
did you read our post ? we will publish the new power supply , hope you like that , but now we did not sell to the world, we just test it at our country first, if there is no problem, I will publish it formally
https://budgetlightforum.com/t/-/58193#comment-1549897
Came by around here because I just found an interesting, inexpensive single long slot li-ion/Ni-MH/Ni-Cd charger (supports 2×700 cells), with up to 2A rate (for li-ion at least).
(Edited because of slip-up) Some sales:
Wed, 08/28/2019
I have ordered one, with the cheapest possible shipping (free).
I wonder why it is posted in my review thread, if RD want me to review it they can just ship one to me (Preferable with box and power supply).
I do like the frontpanel with both encoder and numeric buttons, this is the same as all my professional bench supplies and it usually makes it very easy to use.
there’s a dedicated thread for charger review requests from and for HKJ:
Review request for HKJ [Chargers] | BudgetLightForum.com
Thanks for pinpointing angerdan. The charger is USB powered anyway, so not entirely off-topic LoL. :-))
I just read this post and tell you this , for now we did not publish now
Hi. Newbie here—I just signed up. I’ve been a fan of HKJ’s website since finding out about it two years ago and it is because of his reviews that I purchased a couple of SKYRC MC3000 and an Xtar Dragon VP4 Plus chargers. I sent an email to his website asking for advice and he was nice enough to reply and give me a recommendation. Recently, I got into USB meters and purchased a Power-Z KM001C also because of his review of it. I also purchased a Power-Z FL001Super and a KT001 and I’m thinking of getting a MF001 or a WITRN X-MFI w/ bluetooth. Which do you guys think I should get?
I’m also surprised to find RD tech active here. My first ever USB meter was an entry level RD tech brand but back then I only used it to check if I had a fast charger or not. Now, I use USB meters to check for noise in chargers because I want to protect my devices. Is there an RD tech product with ‘oscilloscope’ feature that can graph and record electrical noise?
Thanks!
These 2 models seem to be updated versions of the above, with USB-C port support and also QuickCharge 2/3 trigger…
https://www.aliexpress.com/item/33040278643.html
(same item from another store)
https://www.aliexpress.com/item/33050667129.html
The UD18 tester looks interesting… I’ve always wanted a quick way to check DC5.5 power consumption. Maybe this tester will help. I wonder what’s the upper current test limit for DC5.5 on this tester? I don’t seem to see the specs from the product page. Although the sample pictures on the product page show it testing laptop charging at 20v 3A for 60-watts power consumption, and another picture showing 30v @ 3 Amps for 90 watts (connected to a load tester device)
I’m looking for a good USB Power supply / charger that supports QC 4.0 / PD 3.0 / 45w to 60w.
I.e. Baseus Speed Series 45w / 60w model
Or you test a similar PS that can be bought on BG / GB / FT or AE? Thank you!
AlsterPlus USB C 100W Powerbank 27000mAh PD 3.0 HUB Ladegerät - BUB160 Externer Akku mit 100W PD Ladeadapter / 100W USB-C Kabel
https://www.amazon.de/AlsterPlus-100W-Powerbank-27000mAh-Ladegerät/dp/B07VQHQQKF/
https://www.kickstarter.com/projects/1203085035/alsterplus-worlds-most-powerful-usb-c-battery-pack
@HKJ : base on your test result, I almost purchased 8 USB chargers for my family, friend and myself, I love the way you did but I also gave you a comment about the difficult in searching your device tested. Would you mind to add the search functionality to let people can search by device name / brand name (full or a part), model…etc ? it will be more convenience for all of us.
THanks
Hello! Recently found an intriguing DIY device in AliExpress, it is an adjustable CC/CV DC/DC boost converter with very low input voltage (2 - 24V), high input current, input overcurrent protection via fuse and resistor adjustable input undervoltage protection. It even features USB output (!) and to top it off its :-)) cheap:
