anyone realise the original htc charger charges faster? especially now with those 4xusb port chargers.
i just did a simple test
test1
4xport 2ah + original htc cable = 150+mah
original charger + original cable = 800mah
test2
4x port 2ah + seagate dual usb cable but pluged in the 'power' cable + mini<->micro converter = 150+mah
original charger + same cable as above = 150mah
test3
4x port 2ah + seagate cable but the data usb head + mini <-> micro converter = 150mah
original charger + same cable + converter =800mah
i believe that the data pins are also supplying power aka pins 2 and 3.
i'm going to test pins2 and 3 with a multi meter when i get back to office.
i have tried 3 different brands of 4xusb chargers. only one of them charges @ 800mah.
please note that the hd2 implies constant voltage/variable current charging algorithms. This means that for a constant charge voltage of 4.2 volts, the charge controller will draw more current if the battery is at 10% then if it's at 90%.
Also, take note that the hd2 has 2 charging modes. The charge controller takes about 850-900mA at max. but as a standard usb port only supplies 500mA, the phone "senses" if it's plugged into a usb port and lowers the max drawn current to anywhere between 100-400mA in order to protect the usb port. The switching between the 2 modes is made by the presence of the usb data pins. If a voltage of about 0.9 to 1.7 volts is present on the data pins and GND, the phone thinks it's plugged into an usb port and will never draw more then 100-400mA. In order to charge as fast as possible, you need to apply power only to the Vcc and GND terminals, without connecting the data pins from the phone (2 and 3) to anything
Sent from my SGH-i917 using XDA Windows Phone 7 App
ok, tested, i soldered pin 2 and 3 on the charger. hd2 is now drawing 900ma
that's the most you'll get from it
Related
Hi,
I saw while using Tbattery 0.56 that when I plug the original AC charger that the S/W (Kaiser) detects it and therefore he pulls more current from the charger.
When I use USB cable, its detects "USB" and takes less current.
now for my question, I have a AC charger from Parrot and when I'm connecting it the device acknowledge it as a "USB" not "AC charger".
Does anyone know if there is an Hardware pin in the mini USB that notify the kaiser wether its USB or AC charger ?
Regards
Nir
Hi Nir
I don't have a Kaiser, but on my prophet I've had quite the same problem.
The USB / AC difference is about the current...
On my USB charger (able to charge any USB device), the current is 0.5A
On my AC charger, provided with my prophet, the current is 1A.
As a result, when my battery is completely drained, i'm unable to charge the device via a simple USB charger. I've got to give a kickstart using the AC charger.
Hope this helps.
David
I have diamond. same 'problem' (or more of a protection from current overdraw) here.
Actually the original ac adaptor shorted the USB data+ and data-
So you'll have to modify your 3rd party USB charger by connecting the center 2 pin of usb jack. you shouldnt do this on pc or laptop as this will render usb connection useless if it doesnt fry your devices.
Do it on your own risk!!
ohms law state
amp == volt / resistence
usb is spc'd volt == 5
max amp == 0.5
AC have a much higher max amp limit then usb
so the internet resistence of the pda set the pace
and it can it seems draw a lot more then usb is spc'd to
so it's not something the device actively does it just
try to draw as many amps as it's spc'd to
resulting in ac charger charging faster then usb
Hi,
Just as the title says, but does the transformer charge via the usb 3.0 ports on some modern motherboards?
Or will it only charge in sleep from those as well. I seem to remember reading that usb 3 had a larger power output, but I cant be sure.
It seems to get a little juice from my GA-EP45T-USB3P - but just a little bit.
-bZj
It should charge at about the same speed as a USB port. The only reason ASUS uses a USB 3.0 cable is so that the AC adapter can deliver 15 (instead of the usual 5v USB) volts over the extra USB 3.0 pins. USB 3.0 ports can deliver 900mA (vs 500mA on 2.0 ports) but that is probably less than the discharge rate of the TF with the screen on.
The Note 3 is the first phone to come with USB 3.0 support, the cable and connector are up to spec.
What I'm wondering if this helps with the charging speed, as the wall charger doesn't seem to be with a USB 3.0 connector.
Does anyone have any insight to this?
Sent from my SM-N9005 using Tapatalk
The wall charger has a 2Ah power output while a pc usb 3.0 port has a maximum output of 900mAh. If you use an USB 2.0 port it's only 500mAh.
The best way to recharge the Note 3 is to use the wall charger.
s1m4an said:
The Note 3 is the first phone to come with USB 3.0 support, the cable and connector are up to spec.
What I'm wondering if this helps with the charging speed, as the wall charger doesn't seem to be with a USB 3.0 connector.
Does anyone have any insight to this?
Click to expand...
Click to collapse
From a dedicated charger the final charging current is normally determined by the PHONE + CHARGER based on how the phone "recognizes" the charger as good/bad (and what battery level you already have + how warm the battery is) and how much power the charger can provide. I believe the max that I have seen on my Note 3 was 1800 mA (which worked with both USB3 cables but also with some good USB2 cables).
From a PC the charging current is the result of a more complex negotiation, the phone can still have "the last word" but it can not go over 500 mA on USB2 or 900 mA on USB3.
Somehow related - please note that on USB3 DATA you STILL need to MANUALLY enable USB3 mode EVERY TIME YOU PLUG TO THE PC. Even if enabled the mode will be reset to USB2 in 10 minutes and lost if you remove and plug-in again. That being said on my Thinkpad I have not seen it charging over 450 mA even when on USB3 under Win7 (but the speed difference exists, so USB3 is correctly triggered).
Also please note that the life of the battery can be heavily influenced by the charging current - the smaller the charging current the more cycles the battery will last on the very long term. Also high temperatures are pretty bad for the battery. So if you are in no hurry it is always better to charge with a small USB2 current that is guaranteed to not go over 500 mA.
Maybe I wasn't clear enough, I'm wondering if the wall charger is utilizing the USB 3.0 capability, and if there's any advantage of using the USB 3 cable over a regular micro USB cable.
Sent from my SM-N9005 using Tapatalk
No, there is not. The Note 3 has a USB 3.0 port, but it is only faster for data transfer. Charging is done at 2.0 speed, not 3.0. Regardless of what you attach it to, it charges just as fast as a 2.0 device.
TheBeast1981 said:
The wall charger has a 2Ah power output while a pc usb 3.0 port has a maximum output of 900mAh. If you use an USB 2.0 port it's only 500mAh.
The best way to recharge the Note 3 is to use the wall charger.
Click to expand...
Click to collapse
What if you used a USB 2.0 cable with the 2Ah AC adapter? Would it still charge in "USB 3.0" mode and not give you a message to use a USB 3.0 cable?
I have my old 1Ah car charger and when I use a USB 2.0 cable, the phone says to use the USB 3.0 cable for faster charging.
But, looking at this pinout:
http://commons.wikimedia.org/wiki/File:USB_3.0_Micro_B_plug.PNG
It seems like only the USB 2.0 section is providing the power?
It's utterly confusing. Would be nice if someone who really knows this stuff explain how it works?
---------- Post added at 09:58 AM ---------- Previous post was at 09:56 AM ----------
ShadowLea said:
No, there is not. The Note 3 has a USB 3.0 port, but it is only faster for data transfer. Charging is done at 2.0 speed, not 3.0. Regardless of what you attach it to, it charges just as fast as a 2.0 device.
Click to expand...
Click to collapse
What's strange is that I have a car charger that is 1.0Ah. When I use a USB 2.0 cable, the phone tells me to use a USB 3.0 cable for faster charging.
When I use a USB 3.0 cable, the message does not appear.
But I'm thinking that the car charger can only put out 1.0Ah regardless of the cable that is used?
Hi guys,
I am building a mobile boombox and also want to charge my Smartphone at it. I already knew, that if you only connect a USB Port to 5V, it will only charge with 500mA.
So i read about the shorten your DataPin stuff, wich let the Smartphone recognize that you are at a dedicated charger and not at a PC/Laptop/... . This works perfectly fine, my Smartphone now shows that it is in AC and not in USB mode.
So i was pretty happy, grabbed my Multimeter and messured with how many Ampere I am charching. Well... it said 500mA.
So I asked google a bit more and found an article about thinker USB cables.
So I startet testing on my original Samsung wallcharger and used a devide to meassure how many watts the divice draws from the socket.
Original Samsung wallcharger + original Samsung cable -> 6,5Watts
Original Samsung wallcharger + chear USB cable -> 2,5Watts
Original HTC wallcharger + original Samsung cable ->6,5 Watts
Original HTC wallcharger + cheap USB cable -> 2,5Watts
Cheap wallcharger + any cable -> 2,5Watts
At my self made charger, no matter what cable i use it only draws 500mA/2,5Watts.
Like I already said, my Datapins are shortend, and it says AC mode, but still it only draws 500mA, even though the module wich provides the 5V (its regulated down from 12V to 5V) can provide up to 3A.
So the cable makes a difference, also does the charger.
Do you have any ideas or suggestions?
Wanted to ask before I consider returning the charger I got
I tested this car charger
https://www.amazon.com/gp/product/B01E764DXM
Using this
https://www.amazon.com/gp/product/B01MT8MC3N
Results were
Using USB A to USB C cable - screen off 8.98v/1A-1.67A(amps varied during the 100mA test I did) - phone read Fast Charging
Using a USB C to USB C cable plugged into the USB C port - screen off 5v/1.8A steady (zero fluctuation) - phone read Cable Charging
Now the charger says it is capable of 5v/3A output out of the USB C port but that's not what I'm getting to the S8, which makes me wonder if it's a limit placed by Samsung software to not go for higher Amperage (and therefore more wattage)
When I look at the estimated charging times, the QC (USB A- USB C) is usually 10 min faster than the USB C charging
9x1.67 is the max the phone supports, on 5v you might get 2a tops, looks like the usb-c port on that charger doesn't support 9v for some reason.
Has anyone found and tried USB-C cables that support high-power 5a and for sale in the USA? https://www.startech.com/ca/Cables/usb-c/usb-c-usb-3-1-cable-power-delivery~USB31C5C1M