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11-01-2018, 07:58 AM
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Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,298
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Quote:
Originally Posted by bkervaski
I tested a bunch of these ... I really wanted the simple look of this one:
(a) $5-$15ea - https://www.aircraftspruce.com/catal...alusbpanel.php
But the one that ultimately worked best and provided true 5A (2.4 per jack) consistently was this one:
(b) Blue Sea Systems - $45ea - https://www.steinair.com/product/dual-usb-panel-jack/
I tested by draining an iPad and iPad mini to dead and then plugged them both into the charger. "B" charged them both simultaneously as fast as the large Apple wall charger. "A" took hours and one of the iPads constantly dinged because it was loosing a connection. I did this 3 times for each charger, just started a test nightly before I went to bed.
I didn't stop there and really wanted the simple clean look of the "A" type chargers so I ordered a half dozen different brands, different sites. Some actually were different, however, most were just the same (Chinese?) unit repackaged and rebranded. All of them did the same thing in tests, the ones that worked anyway.
With a two place airplane and both people having smart phones and iPads, I extended the test by connecting two chargers to one 12V regulated source, 4 USB ports total.
The "A" units performed the same, horribly. After a few hours of constant disconnect "dinging" I just stopped the test.
The "B" units took whatever I threw at them like a champ, at one point having 2 dead iPhones, and 2 dead iPads sucking on them like a newborn, didn't skip a beat! The 100% charge times were within a few minutes of the solo test and they never even kicked the fan on from the power supply, highest draw was just over 10 amps as expected, average was around 4 amps.
The final test was all 4 devices playing video for an hour, surprised to say the chargers kept them at 95-100% power the entire time. I just stopped at an hour concluding that I was at that point just being excessive in my testing.
The "B" units (I purchased from SteinAir) just didn't have any issues at all. The bevel is larger and there is undesirable branding that I don't like, I doubt anyone but me would notice.
While very slow charging, most the other units did fine with just one device connected, but just one port at a time, the secondary port would simply drop to half an amp or lower.
Not scientific or exhaustive, but close enough, hope it helps!
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Did you test this in the plane or just on the bench. Curious if it performs noise free. However, I figure if Stein sells them that they would have tested for this before offering it.
__________________
N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019
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11-01-2018, 08:51 AM
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Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 1,645
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Quote:
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Did you test this in the plane or just on the bench. Curious if it performs noise free.
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Just on the bench .. the units claim to have "reduced electronic interference".
__________________
RV-14A #140376
N196 (Flying)
2019 Bronze Lindy
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11-01-2018, 09:14 AM
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Join Date: Jan 2005
Location: Indianapolis, IN (KUMP)
Posts: 1,024
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I have 2 in the -10 and they are totally noise free.
__________________
Thomas Short
KUMP - Indianapolis, IN / KAEJ - Buena Vista, CO
RV-10 N410TS bought / flying
RV-8 wings / fuse in progress ... still
1948 Cessna 170 N3949V
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11-01-2018, 10:20 AM
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Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,298
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Quote:
Originally Posted by TShort
I have 2 in the -10 and they are totally noise free.
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Thanks! more char's for Doug
__________________
N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019
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11-01-2018, 09:05 PM
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Join Date: Nov 2012
Location: Half Moon Bay, CA
Posts: 1,035
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I'm using a Powerwerx 2 USB charger. It fits in a round hole and has faston tabs on the back. It does the internal regulation to 5V for USB charging.
https://powerwerx.com/panel-mount-du...er-high-output

__________________
Bill Bencze
N430WB RV-7 #74152 @ KHAF, tip-up; IO-360-M1B; Hartzell CS. !! Phase 1 !!
2357 hrs over 8.5 years to get to flying. Log at: http://rv7.wbencze.com
VAF 2020 donation happily made
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11-02-2018, 02:16 PM
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Join Date: Mar 2008
Location: Anacortes, WA
Posts: 823
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Quote:
Originally Posted by CharlieWaffles
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How many amps will these USB ports put out? You need 2.4 amps to charge an iPad when it is running a GPS moving map app like Foreflight. 2.1 amps barely maintains. 1.0 amp drains.
__________________
Steve Lynn
RV-7A
Flying Phase I
Anacortes, WA
www.mykitlog.com/sglynn
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11-02-2018, 03:32 PM
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Join Date: Jul 2017
Location: Kemah, Texas
Posts: 111
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Commit Lift USB
I've purchased several USB panel mounted chargers in the past, including both units from Stein, but found none that would keep my devices charged while in-use. The exception was Commit Lift's charger. It will quickly charge my Ipad and Stratus, simultaneously, while in use during flight.
Ron B.
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11-02-2018, 03:40 PM
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Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,219
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Strangely, I have a USB adapter that plugs into the aux power port in my panel. It makes zero noise. I think it was $5 at a local auto parts store.
Personally, I like having the non-dedicated 12V receptacle plus the usb converter plug. I can use the 12V receptacle for a lot of things - running an air compressor, charging the battery in the airplane, etc., and when I want, I can pull power through the USB port. The aux plug has enough pass through capability to charge both the ipad and iphone at the same time...
__________________
Kyle Boatright
Marietta, GA
2001 RV-6 N46KB
2019(?) RV-10
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11-02-2018, 03:46 PM
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been here awhile
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Join Date: Dec 2004
Location: North Alabama
Posts: 4,301
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Quote:
Originally Posted by Kyle Boatright
Strangely, I have a USB adapter that plugs into the aux power port in my panel. It makes zero noise. I think it was $5 at a local auto parts store.
Personally, I like having the non-dedicated 12V receptacle plus the usb converter plug. I can use the 12V receptacle for a lot of things - running an air compressor, charging the battery in the airplane, etc., and when I want, I can pull power through the USB port. The aux plug has enough pass through capability to charge both the ipad and iphone at the same time...
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I tried three USB ports from various sources to power the Stratux ADS-B receiver and they were all noisy. On a lark while at Walmart I picked up a $5 adapter at the checkout as Kyle described and it works perfectly. 
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11-07-2018, 12:31 AM
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Join Date: Sep 2018
Location: Wisconsin
Posts: 8
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Likes others have said, be very wary of the nasty EMI some of these converters produce. I had one that would inject random screen taps to my tablet. Put your radio in monitor mode and plug it in, then plug your device in. You shouldn't hear much of a change in static if it's a quality design.
Carling makes this:
http://www.carlingtech.com/controls-v-charger
Would go nicely with a panel using these style switches.
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