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02-05-2020, 09:56 AM
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#1
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Rivet Master 
2019 25' International
Providence
, Rhode Island
Join Date: Aug 2018
Posts: 733
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USB Outlet that supports Samsung Fast Charge
With spring coming we realized we need more usb charge capability.
My Galaxy S9+ supports fast charging.
This requires the USB source to be able to drive 9VDC @X current vs. 5VDC @X current.
We bought:
https://www.lowes.com/pd/Legrand-rad...utlet/50253183
and I tested it, it doesn't support fast charging.
Most of the ones I've looked at all say in some form or another "fast charge" which in this case doesn't mean what Samsung requires it to mean.
It's the difference of charging a near dead phone in under an hour vs 3-5 depending.
Does anyone know of a USB Outlet that does support Fast Charge?
I've search Google high and low and most don't tell what the USB voltages are or they say some form of "Fast Charge for more devices" which isn't what I'm after.
I'm looking for this both on the AC side outlets and the 12VDC side for when there is no shore power.
Any help/pointers would be great.
Thanks,
Chris
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02-05-2020, 10:04 AM
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#2
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Moderator

2017 26' Flying Cloud
Alamo Heights
, Texas
Join Date: Aug 2006
Posts: 7,754
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I killed the USB outlet by my bed by plugging in an ipad and another device at the same time... while they were both charging, the USB port overheated and it slagged the cheap thing.
I replaced it with a Blue Sea 1045. I can't say what a Samsung device will think of it, but when I plug in my Pixel it says "Charging rapidly."
__________________
— David
Zero Gravitas — 2017 Flying Cloud 26U | WBCCI# 15566
He has all of the virtues I dislike and none of the vices I admire. — Sir Winston Churchill
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02-05-2020, 10:15 AM
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#3
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Rivet Master 
2019 25' International
Providence
, Rhode Island
Join Date: Aug 2018
Posts: 733
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Thanks for the fast feedback.
I'm not sure how Pixel determine fast or not, I can only assume it is measuring the incoming current draw when it connects to it.
I see this for that recommended USB output:
5V DC ±5%
So that probably won't work. I've added a picture to show what the adaptive fast charging values are right from Samsung if that helps anyone to help me find a solution.
Thanks again
http://kittmaster.com/imagedump/misc/Samsung.jpg
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02-05-2020, 10:25 AM
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#4
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Rivet Master 

2012 25' FB International
Trent Woods
, North Carolina
Join Date: May 2013
Posts: 3,091
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I don't understand. If you are look for a USB outlet that is powered by 120 vac for your fast charge, why not just buy a cube that plugs into an AC outlet and provides the fast charge voltage? Didn't your Samsung come with one?
Larry
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02-05-2020, 10:30 AM
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#5
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Rivet Master 
2019 25' International
Providence
, Rhode Island
Join Date: Aug 2018
Posts: 733
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Quote:
Originally Posted by lsbrodsky
I don't understand. If you are look for a USB outlet that is powered by 120 vac for your fast charge, why not just buy a cube that plugs into an AC outlet and provides the fast charge voltage? Didn't your Samsung come with one?
Larry
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Yes, it did, I just don't want to have to move the cubes around. It would be just easier to have dedicated cables in the trailer than having to pack em up every time we go somewhere.
This is more of a convenience thing than anything else.
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02-05-2020, 10:56 AM
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#6
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Rivet Master 

2016 27' International
Sherwood Park
, Alberta
Join Date: Jul 2017
Posts: 600
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Quote:
Originally Posted by kittmaster
Yes, it did, I just don't want to have to move the cubes around. It would be just easier to have dedicated cables in the trailer than having to pack em up every time we go somewhere.
This is more of a convenience thing than anything else.
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Get a second fast charging cube and charge cord, one for the trailer, one for the house. That is what I did and the trailer one just stays plugged into a wall outlet powered by the inverter when we are not plugged in.
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02-05-2020, 10:58 AM
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#7
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Rivet Master 

2012 25' FB International
Trent Woods
, North Carolina
Join Date: May 2013
Posts: 3,091
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Understood. I have an old Crown Royal bag that I pack with cords and cubes for every trip, Airstream, car, or plane. I just throw the bag in the big drawer in the Airstream. Seems like the only way to have everything since my rechargeable flashlight requires a special cord, my laptop has to have its cube because normal USB voltage isn't enough, and so on.
Larry
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02-05-2020, 12:15 PM
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#8
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Rivet Master 

2017 22' Sport
NCR
, Ontario
Join Date: Feb 2017
Posts: 2,412
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go to a big box store and get a usb3 charger
make sure it has BLUE on the outlet
white is lowest out put, then black and Blue is the current fastest
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02-05-2020, 12:26 PM
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#9
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Rivet Master 
1981 31' Excella II
New Market
, Alabama
Join Date: Sep 2011
Posts: 6,130
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I have some of these type smart chargers that will put out 2.4A at 5V. This one I think is compatible with the latest technology.
https://www.amazon.com/dp/B01BF3OZ9W/ref=emc_b_5_i
Perry
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02-05-2020, 12:43 PM
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#10
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Moderator

2017 26' Flying Cloud
Alamo Heights
, Texas
Join Date: Aug 2006
Posts: 7,754
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A viable option might be for you to replace one of the USB outlets with a regular 12v accessory socket (like an old-school cigarette lighter) and plug something like this into it... almost flush, and easy to update with a newer-tech quick-charge item later:
https://www.amazon.com/AINOPE-Charge.../dp/B07XJTT9WG
__________________
— David
Zero Gravitas — 2017 Flying Cloud 26U | WBCCI# 15566
He has all of the virtues I dislike and none of the vices I admire. — Sir Winston Churchill
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02-05-2020, 12:51 PM
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#11
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Moderator

2017 26' Flying Cloud
Alamo Heights
, Texas
Join Date: Aug 2006
Posts: 7,754
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Quote:
Originally Posted by DKB_SATX
A viable option might be for you to replace one of the USB outlets with a regular 12v accessory socket (like an old-school cigarette lighter) and plug something like this into it... almost flush, and easy to update with a newer-tech quick-charge item later:
https://www.amazon.com/AINOPE-Charge.../dp/B07XJTT9WG
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Another thing to be aware of: Crappy USB cables can give you slow charging even on capable ports. My Pixel3 and its Pixel1 predecessor came with USB-C wall chargers so I wasn't using iffy USB-A to USB-C cables, but my partner's Samsung chargers are all USB-A outputs, and I noticed that some cheap cables (NOT the Samsung-provided ones) didn't deliver fast charging even on his newer Samsung chargers.
__________________
— David
Zero Gravitas — 2017 Flying Cloud 26U | WBCCI# 15566
He has all of the virtues I dislike and none of the vices I admire. — Sir Winston Churchill
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02-05-2020, 01:24 PM
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#12
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Rivet Master 
2006 23' Safari SE
Lexington
, Kentucky
Join Date: Dec 2012
Posts: 3,081
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Quote:
Originally Posted by DKB_SATX
Another thing to be aware of: Crappy USB cables can give you slow charging even on capable ports. My Pixel3 and its Pixel1 predecessor came with USB-C wall chargers so I wasn't using iffy USB-A to USB-C cables, but my partner's Samsung chargers are all USB-A outputs, and I noticed that some cheap cables (NOT the Samsung-provided ones) didn't deliver fast charging even on his newer Samsung chargers.
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Yes, the cable can make a difference. Before returning the outlets, use the cable that came with your Samsung and see if you still get the error message. I was getting the error when using the cigar lighter plug that had the USB outlets. I changed cables and no error.
__________________
-Rich
Rich & Yvonne
2006 Safari SE -Dora-
2004 4Runner SE
Most of us don't know exactly what we want, but we're pretty sure we don't have it. -Alfred E. Neuman
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02-05-2020, 01:38 PM
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#13
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Rivet Master 
2019 25' International
Providence
, Rhode Island
Join Date: Aug 2018
Posts: 733
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The cable I'm using is what came with the phone. When plugged into the cube, phone fast charges.
When I used same cable with adapter listed above, it was just "charging" not "fast charging".
It has to do with the 9V step and adaptive switch over. I guess a lot of current options don't support it.
Thanks for all the good feedback.
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02-05-2020, 04:03 PM
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#14
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Rivet Master 
1969 18' Caravel
Greenville
, whereEverIroam
Join Date: Dec 2017
Posts: 984
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Quote:
Originally Posted by DKB_SATX
A viable option might be for you to replace one of the USB outlets with a regular 12v accessory socket (like an old-school cigarette lighter) and plug something like this into it... almost flush, and easy to update with a newer-tech quick-charge item later:
https://www.amazon.com/AINOPE-Charge.../dp/B07XJTT9WG
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I agree with David. Another key advantage of installing this type of outlet: it is compatible with a huge array of devices designed to plug into it: more than USB type A; another key advantage, it's future proof, so in two years or less, when you get a new phone that has the newer USB Type C connection, you simply have to swap out your adapter, and in 5 more years, whatever type plug they are using then...
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02-05-2020, 05:00 PM
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#15
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Rivet Master 
2006 23' Safari SE
Lexington
, Kentucky
Join Date: Dec 2012
Posts: 3,081
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Quote:
Originally Posted by skyguyscott
I agree with David. Another key advantage of installing this type of outlet: it is compatible with a huge array of devices designed to plug into it: more than USB type A; another key advantage, it's future proof, so in two years or less, when you get a new phone that has the newer USB Type C connection, you simply have to swap out your adapter, and in 5 more years, whatever type plug they are using then...
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OP has a Samsung Galaxy S9+, so already using the USB-C connector. They started using that in the S8, but your point is valid. I can still use my old chargers but they are slow. Samsung, at least for the S8, included an adapter that slides over the micro-USB connection. All of the plug in chargers use standard USB connections so you can use different cables with them, regardless of the connector is on the phone end. Amazon offers the adapters too. I bought a box... now if I could only remember where I put them.
__________________
-Rich
Rich & Yvonne
2006 Safari SE -Dora-
2004 4Runner SE
Most of us don't know exactly what we want, but we're pretty sure we don't have it. -Alfred E. Neuman
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02-06-2020, 06:28 AM
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#16
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Rivet Master 
2019 25' International
Providence
, Rhode Island
Join Date: Aug 2018
Posts: 733
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I ordered this and will be here tomorrow:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
It calls out S9 specifically, will report back if it works as expected.
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02-06-2020, 08:00 AM
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#17
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Site Team

2002 25' Safari
Dewey
, Arizona
Join Date: Mar 2005
Posts: 14,432
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Is that going to fit in the wall. It looks like it might be too deep.
__________________
Richard
Wally Byam Airstream Club 7513
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02-06-2020, 08:05 AM
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#18
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.-. -...
2017 25' International
Port Dover
, ON Canada
Join Date: May 2016
Posts: 1,830
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Quote:
Originally Posted by kittmaster
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It will likely be too thick (deep) to fit in an Airstream wall.
__________________
Ray B.
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02-06-2020, 08:49 AM
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#19
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Rivet Master 
1969 18' Caravel
Greenville
, whereEverIroam
Join Date: Dec 2017
Posts: 984
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I may be mistaken, but it appears that that outlet needs to be wired into your 110 system. This means it will only have power when you are plugged into shore power, unless you have something set up in your camper to run the 110 outlets through an inverter off of your battery.
Even in that case, it would be less efficient because your battery’s 12 V DC supply is being converted to 110 AC and then in the receptacle, back to DC again.
A cigarette lighter type outlet, on the other hand, will work both on shore power and directly off of your battery in the most efficient manner feasible, prolonging your battery life. And the adapter that David link to in the post above does specifically output a fast charge electrical current for your Samsung.
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02-06-2020, 08:59 AM
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#20
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Rivet Master 
2019 25' International
Providence
, Rhode Island
Join Date: Aug 2018
Posts: 733
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Quote:
Originally Posted by skyguyscott
I may be mistaken, but it appears that that outlet needs to be wired into your 110 system. This means it will only have power when you are plugged into shore power, unless you have something set up in your camper to run the 110 outlets through an inverter off of your battery.
Even in that case, it would be less efficient because your battery’s 12 V DC supply is being converted to 110 AC and then in the receptacle, back to DC again.
A cigarette lighter type outlet, on the other hand, will work both on shore power and directly off of your battery in the most efficient manner feasible, prolonging your battery life.
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I plan to have both types on board. We spend a lot time on grid at most of the places we stay, if not we have a generator otherwise.
I will be looking at the 12VDC version after I sort this one out for the 120 to USB charging.
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