Thanks Henrik, looking forward to your reviews.
Ikea 3 port charger (new version)
Ikea LÖRBY
2.4A max per port
3.4A max combined
£10
Their charging estimate of 1 hour is wack. It’ll probably take about 2 hours to charge a 100Wh battery with a 100W charger.
Yeah. Unless you want to reduce cycle life drastically, a USB-C PD 3.0 port will never kick out a continuous 100W until the end. Unless they picked out an aggressive charging profile that charges at 100W power just until it reaches CV phase, which is not too healthy for the cells inside, even if they LG MJ1s.
Also, they’re using LG MJ1s, so that’s nice.
Hi,
Would it be posible to review this DIN rail USB power device?
MEAN WELL Din-Rail power supply 12W MeanWell (DR-15-5)
I’m plannig to use it on my next raspberry pi Project.
Thanks
We know the CV phase thing usually induces an additional top off delay largely dependent of the charging circuit output to battery path plus battery resistance. Since cells are spot welded that is usually quite low in a good powerbank, minimizing the CV phase time a lot.
By the way, the CV charging phase could be eliminated by monitoring cell voltage right at the battery terminals and cutting off charging right when battery terminal voltage reachs its maximum (usually 4.2V) and current tapers down to preset value. This is monitoring two conditions instead of one.
Cheers ^:)
The charge curve in all my battery reviews is done that way, it do not eliminate the CV phase.
Hello,
Could you please test Ugreen 2 x QC3.0 ports charger if you’d like?
Cheers!
Revisiting this a bit, maybe I messed up myself somewhat in the above explanation. What I was trying to say is that if we monitor cell voltage right at its terminals and use this value for cut-off, the whole I × R drop from the charging converter's output to the battery/cell terminals is eliminated. You say it does not eliminate CV phase, but at least for low internal resistance cells its duration must diminish greatly, doesn't it?
By adding a way for our charger to accurately measure current path resistance plus cell DC internal resistance, we could fill the cell or battery in one constant current go by adding dV = Icharge × Rpathplusbattery to the desired and cut-off monitored charging voltage wherever it is, with absolute cut-off (no tapering whatsoever). So, for cut-off voltage:
Vcutoff = Vbatterymax + (Icharge × Rpathplusbattery)
I am going to test that personally in my precision power supply and cutting off by hand, though I already know the result. :-)
Cheers ^:)
That depends on the charger, but yes many chargers reduce current early.
That would be outside the specified charge parameters.
Well, if you mean that the charger's maximum output voltage must be tuned for a higher than maximum permissible (4.2V?) charging voltage that is true. Albeit, the final battery voltage after cut-off should be right on the spot.
Cheers :-)
How about a review about the WITRN-X MFI current voltmeter USB tester QC4+ PD3.0 2.0 PPS fast charge protocol capacity ?
That is exactly what I mean, charge specifications says you are not allowed to go above 4.2V when charging.
Interesting device, but I do not buy from Taobao.
Yeah, but I guess the charge specifications mean to say charging should stop when cell voltage reachs maximum allowed charge voltage. Since my method infers absolute voltage drop caused by charger's output to cell pathway plus own cell/battery internal resistance… I get it. Cell/battery would get an Icharge × Rbattery overvoltage a its terminals, but just for the time it takes to reach charger's maximum voltage (with sudden cut-off).
I wonder if this would actually harm batteries due to the brief exposure time. It could also be accompanied by a slightly reduced final charge voltage as to diminish this overvoltage and for the lifecycle benefit. 
Cheers :-)
What do you mean?
Did you already buy it from Taobao?
One small word where missing, I have added it.
If you see it on Aliexpress, please post a link.
MFI input…
What is it for??
Testing Apple Lightning USB cables.
Very few testers can do it, as they need MFI certification to work with USB passthrough, which is why they are more expensive than most USB testers.
Some time ago you reviewed XHF30W.
There is at least 1 other charger that looks nearly the same which may mislead some people. It’s cheaper and likely bad. It may be good to do a review of this one as well. https://www.aliexpress.com/item/Universal-18-W-USB-Quick-charge-3-0-5V-3A-for-Iphone-7-8-EU-US/32948261221.html
A cheap 3-port charger said to weigh mere 35g:
https://www.aliexpress.com/item/newCARPRIE-New-Hot-Travel-5V-2A-3Ports-USB-EU-Wall-AC-Adptive-Fast-charger-Adapter-for/32844167360.html
As long as it works and is safe I would call it nice. 
Thanks for the explanation…
I dont have any apple product XD