763 USB ports: do they ever work?
#1
Original Poster
Join Date: Mar 2000
Location: HSV
Programs: DL DM, Marriott lifetime Ti, USMC
Posts: 498
763 USB ports: do they ever work?
I am on a domestic 763 and, for fun, tried plugging my iPad into the in seat USB port in 13C. Nada. So I tried my iPhone. Also nada. My seat opponents' ports don't work either.
I have never had these work on a 763, although I am usually on other aircraft types. Are they supposed to work? Is there a magic trick?
I have never had these work on a 763, although I am usually on other aircraft types. Are they supposed to work? Is there a magic trick?
#3
Join Date: Jun 2010
Location: Austin, TX
Programs: DL DM; DL AMEX Reserve; HHonors Gold
Posts: 1,984
On all DL equipment I have tried (76x, 777, 747), despite all appearances to the contrary, the devices charge by the time I reach my destination. Sometimes it even says "Not Charging", yet 6-10 hours later I have full charge and it's ready to go.
#5
Join Date: Nov 2008
Location: DTW
Programs: Delta SM, ICH PLAT
Posts: 1,188
Post #2 answered it. USB (except for USB 3.0) has a specification limit of 500mA (half an amp). Your iphone and ipad, while uses the USB interface, doesn't really conform to it in that it draws much much more current (over 1000mA for the iPad)....
Some devices will charge (slowly) even if it say it isn't charging, but will take a long long time.
I had some experience where my stock laptop adapter was drawing too much current and resetting the outlet's circuit breaker... so it didn't charge, changing to a 90W travel adapter made it work.
Your charger needs to be smart enough to draw only what is given, otherwise, it won't charge.
In the end, YMMV.
Some devices will charge (slowly) even if it say it isn't charging, but will take a long long time.
I had some experience where my stock laptop adapter was drawing too much current and resetting the outlet's circuit breaker... so it didn't charge, changing to a 90W travel adapter made it work.
Your charger needs to be smart enough to draw only what is given, otherwise, it won't charge.
In the end, YMMV.
#6
FlyerTalk Evangelist
Join Date: Jul 2003
Posts: 23,050
I believe Apple devices may trickle charge off a 500mA USB port if they are in standby mode. Not sure if that is true with the non-intelligent airplane USB ports though. You may need to trick the Apple device with a couple 49.9K and 75K ohm resistors as documented here to present +2.0V on the D+ and D- USB lines.
#7
Join Date: May 2005
Location: Chattanooga, TN
Programs: DL Diamond Million Miler, AA Ex-Plat, IHG RA, Marriott PLAT, HERTZ Pres Circle
Posts: 1,220
I am on a domestic 763 and, for fun, tried plugging my iPad into the in seat USB port in 13C. Nada. So I tried my iPhone. Also nada. My seat opponents' ports don't work either.
I have never had these work on a 763, although I am usually on other aircraft types. Are they supposed to work? Is there a magic trick?
I have never had these work on a 763, although I am usually on other aircraft types. Are they supposed to work? Is there a magic trick?
#8
Original Poster
Join Date: Mar 2000
Location: HSV
Programs: DL DM, Marriott lifetime Ti, USMC
Posts: 498
Hmmm. This is odd; the USB ports in my 763 wouldn't work to charge either my iPad (which can, but does not have to, draw 1A) or my iPhone. Then on my new-ish 738 leg SLC-SFO, plugging in the Apple wall charger to the in-seat 110V outlet wouldn't charge either device. When I swapped to a backup Apple wall charger, it wouldn't charge either. Both of these chargers are known good (I used them Saturday at home), so I'm not sure what was going on.
Next time I'm on a 763 I'll take a lower-power device and see if I can USB-charge it.
Next time I'm on a 763 I'll take a lower-power device and see if I can USB-charge it.
#10
FlyerTalk Evangelist
Join Date: Nov 2005
Location: Phoenix, AZ
Programs: AA Gold AAdvantage Elite, Rapids Reward
Posts: 38,320
#11
Join Date: Jun 2004
Location: ATL
Programs: Delta PlM, 1M
Posts: 6,363
Seriously, likely just for future expansion. Costs nothing to put a spare jack in, costs a lot to add in later.
#12
Join Date: May 2005
Location: Chattanooga, TN
Programs: DL Diamond Million Miler, AA Ex-Plat, IHG RA, Marriott PLAT, HERTZ Pres Circle
Posts: 1,220
Hmmm. This is odd; the USB ports in my 763 wouldn't work to charge either my iPad (which can, but does not have to, draw 1A) or my iPhone. Then on my new-ish 738 leg SLC-SFO, plugging in the Apple wall charger to the in-seat 110V outlet wouldn't charge either device. When I swapped to a backup Apple wall charger, it wouldn't charge either. Both of these chargers are known good (I used them Saturday at home), so I'm not sure what was going on.
Next time I'm on a 763 I'll take a lower-power device and see if I can USB-charge it.
Next time I'm on a 763 I'll take a lower-power device and see if I can USB-charge it.
#13
FlyerTalk Evangelist
Join Date: Jul 2003
Posts: 23,050
Hmmm. This is odd; the USB ports in my 763 wouldn't work to charge either my iPad (which can, but does not have to, draw 1A) or my iPhone. Then on my new-ish 738 leg SLC-SFO, plugging in the Apple wall charger to the in-seat 110V outlet wouldn't charge either device. When I swapped to a backup Apple wall charger, it wouldn't charge either. Both of these chargers are known good (I used them Saturday at home), so I'm not sure what was going on.
Next time I'm on a 763 I'll take a lower-power device and see if I can USB-charge it.
Next time I'm on a 763 I'll take a lower-power device and see if I can USB-charge it.
#14
Join Date: Feb 2009
Location: BER, SAT, AUS
Programs: Feels like FO (AA EXP)
Posts: 1,611
Post #2 answered it. USB (except for USB 3.0) has a specification limit of 500mA (half an amp). Your iphone and ipad, while uses the USB interface, doesn't really conform to it in that it draws much much more current (over 1000mA for the iPad)....
Some devices will charge (slowly) even if it say it isn't charging, but will take a long long time.
I had some experience where my stock laptop adapter was drawing too much current and resetting the outlet's circuit breaker... so it didn't charge, changing to a 90W travel adapter made it work.
Your charger needs to be smart enough to draw only what is given, otherwise, it won't charge.
In the end, YMMV.
Some devices will charge (slowly) even if it say it isn't charging, but will take a long long time.
I had some experience where my stock laptop adapter was drawing too much current and resetting the outlet's circuit breaker... so it didn't charge, changing to a 90W travel adapter made it work.
Your charger needs to be smart enough to draw only what is given, otherwise, it won't charge.
In the end, YMMV.
I believe Apple devices may trickle charge off a 500mA USB port if they are in standby mode. Not sure if that is true with the non-intelligent airplane USB ports though. You may need to trick the Apple device with a couple 49.9K and 75K ohm resistors as documented here to present +2.0V on the D+ and D- USB lines.
Once again, this article goes in to great details on Apple device charging. The USB ports on the 763 are from the days of the iPod and predate the iPhone/iPad. Starting with the iPhone 3GS (and iPad), Apple does not support the older USB SEI standard for charging that is employed by the USB ports on the 763.