Hello,
I was looking at getting a USB adapter for mains so i could charge my S2 using the USB cable provided. The original charger outputs 5V=0.7A.
I've seen a car USB adapter that outputs 5V=0.8A. Does the 0.1A increase affect the charge? Or will it be ok to use on my S2?
Furthermore, I've seen 2 mains USB adapters which output 5V=0.5A and the other is 5V=1A. Which of these would be better to get?
i'm curious about this as well. but if you look at other threads,
quite a number of people says that higher current rate doesn charge the phone faster or damage it. the S2 will capped the charging current to 650mA.
so no worries mate.
I occasionlly charge my sgs2 with my ipad-charger, which got 5V=2A.
Haven't got any problems with that, but it doesn't feel faster.. probably not recommdable. :-/
Sent from my GT-I9100 using XDA App
SGS2 capped to 650mA via Mains charger and 400mA via USB.
Can only be changed by using a custom kernel.
Using a charger with a higher mA wont hurt the phone, it just wont take advantage of it.
I think this is related Electrical knowledge.
for example, 5V x 1A = 5W (power). That means the transfer max. output power is 5W. If your transfer power is larger than your phone demand, that's OK. Will not damage the phone.
But i dont' know the phone charging demand
Related
I notice that the standard AC/Charger is 0.7A output. Possible to use another AC/Charger rated at 1.0A output? What is the USB output anyways? Thanks in advance for any help or suggestions.
PS Still considering rooting or not (will it void my warranty?) *WUSS*
I am using my Galaxy Tab 2.5A charger to charge the S2. It still takes about the same amt of time to charge up full.
I believe the charger current rating is the max current it can supply. The S2 will still draw current at it's own max...maybe 0.7A.
Doesn't matter what charger you use on it, if it's greater than 0.7A The S2 will limit itself to 0.7A.
if you want raise charging amperage, you can help me looking for someone, who will change(raise) it in kernel...
http://forum.xda-developers.com/showthread.php?t=1132649
Given the same voltage (i.e 5V for USB), it's the resistance of the phone that determines how much current is drawn from the charger. Therefore anything above the rated 0.7A would work fine and dandy.
Thanks to all the fellas that responded! More than enough information provided.
Sent from my GT-I9100 using XDA App
The standard for usb is 500mA/5v and this is what you get out of most computers, usb hubs and so on. AC to usb chargers will also run at that more often than not. AC chargers on the other hand usually run hotter, up to 1A and more. I have a 1A and a 1.5 amp and both charge this phone at exactly the same rate. It was not so with my N1 where the 1.5 was quite a bit faster, certainly appears like there is throttling going on as others stated. I would be curious why they did this when some other ODMs are selling phones with 1A and higher rated chargers.
look in the source code, wall charging is capped at 650 mA and USB is capped at 450 mA. and this makes sense why samsung included a 0.7 Amp charger.
Can anybody recommend an external power pack that works with the flyer/view? I was looking at this:
http://www.amazon.com/New-Trent-IMP...FO/ref=sr_1_20?ie=UTF8&qid=1324398340&sr=8-20
It will work with your Flyer, but it will charge much slower than the HTC power cord due to the USB connector. It may or may not keep your unit powered during normal use depending the way you use your device since the current supplied will be limited by the standard USB cable (~500ma) vs. the propriety HTC charging cable (1200 ma). I would test by powering your Flyer off a standard PC USB port and see, This should be roughly equal to what this device will supply.
Hmm, me thinks I just spotted hardware hack number 3.
globatron said:
Hmm, me thinks I just spotted hardware hack number 3.
Click to expand...
Click to collapse
lol
This would be great please keep us updated
I picked up a Dreamgear iSound 8000 ma model on sale from expansys, seemed like a nice unit and was supposed to be able to push 2amp but it's no faster with the HTC cable than a regular generic microUSB cable hooked up to a usb port. The biggest drawback was the thing completely died on me before the first cycle, I mean DEAD, won't charge and the flashlight doesn't even work. So much for on sale, return shipping $$.
Neil
As I posted previously in this thread it does not matter what current the source supply can provide. The cable is the magic. Standard cable, standard charge rate of 500ma which is about 30% of what the HTC charger will give you
DigitalMD, reread his post. He clearly states that using both the HTC flyer cable, as well as a standard micro USB, gives him no difference. So while your conjecture that "it does not matter what current the source supply can provide. The cable is the magic." is interesting, it is not, in fact, entirely accurate. Perhaps the cable is "the magic" in certain environments, but clearly not all.
No conjecture at all, in this case it is a fact. The Flyer cable has extra pins and conductors that are not in a standard USB cable. This tells the Flyer when a power supply is connected vs. a standard USB and the Flyer then allows for higher charging rate. Whit out that special cable, it will only charge at 500ma or aprox. 30% of the HTC power supply rate.
Actually less than that even. The htc charger runs at ~9v > 1amp. A lithium battery can rapid charge in the range of 900mA to 1.2A depending on the cell(s) in the battery.
There are two cells or two packs (can't tell which on visual inspection) in the flyer battery running in parallel. A proper htc charger running at 1A provides approximately 10W of charging power, a 5 volt source running at 500mA provides 2.5W so the USB charging will be 4 times slower.
As discussed in another thread shorting USB D+ and D- will allow the flyer to recognise a wall charger and charge at 5v 900 mA, the same could be applied to a battery pack capable of providing 900 mA sustained. It wouldn't be as quick as the wall charger but it is probably enough to provide for charging while using the device, rather than just slowing discharge.
On the question of leads, using a htc cable or standard micro USB makes no difference by default. When connected to a USB socket the flyer/view cable behaves like any other USB cable, the wiring modification is done inside the charger for a wall charger, and would most safely be done the same way for a battery pack.
The flyer internally uses a threshold voltage plus the D+ and D- pins to determine if it is charging from 5v or the dedicated higher voltage wall charger.
yes your post is a more accurate explanation, thanks
Thanks for the input. I will give that one a try and take my View cable with me. I have long road trip coming up.
I know different chargers have different amps, but what i dont know is how much the phone (battery) can take at a time, even if the charger is 10 amp it doesnt been the phone get fully charge in 10 min.
Look for how much the charger gives out is not hard cause its label, but how much does the phone take?
cant seem to edit my thread (TYPO) nor find it on my profile, maybe its my browser.
Samsung phones charge at about 800mA. Samsung chargers have the two middle pins (data pins) soldered. Any regular charger, even with 2Amps will only max at about 330mA charging. The phone needs to detect that the two data pins are soldered. So higher Amps is not equal to faster charging unless you are using a Samsung charger or you have the data pins soldered( pretend to be Samsung charger)
Sent from my GT-I9100 using xda premium
No. The phone will regulated the charging on the device as lipoly batteries have a specific charging method. It is possible (for example) that the device may charge at 500mA maximum current draw, but a charger is rated at 1A. This would meen that the charger could output 1A without the voltage falling so in theory the usb output could be split between two devices. If the charger was rated at 300mA but the device needed 500mA then the output voltage may be very unstable and damage either the phone or the charger.
Choosing a higher rated charger will not charge the phone faster. Any attempt to do so with Lipoly chemistry could result in explosion.
Sent from my U20i using Tapatalk 2
This is were i got my info from:
http://forum.xda-developers.com/showthread.php?t=1384253
Were did you get yours from?
Sent from my GT-I9100 using xda premium
Hi,
I've read some threads here about charging the S3, but not all is clear to me. I would appreciate some explanation:
1) I've read that the stock chargers output 1A. However, on the charger I got with my S3 it's written "output: 5V 0.7A". So do you think I somehow got a wrong charger?
2) I want to buy a car charger for the S3. There are many generic car chargers in ebay, some of then output 2A current. What is the maximum current allowed for the S3? I couldn't find this number in my S3 manual or on the phone itself. Will a charger of 2A cause harm to my phone? or to the battery? or to both?
Thanks in advance!
bump... does anyone know?
My charger output states .05v=1.0a.
As for what aftermarket charger to buy, I would stay away from chargers with more output than the official for 'peace of mind that my charger's specifications are the same as the official charger that came with the phone' reasons.
Cheers
Generally wall chargers output 1000mA (1A) and USB ports 500mA (0.5A)
You do not want to purchase anything that goes above 1000mA
Sent from my GT-I9300 using Tapatalk 2
I attach a picture of the adapter I got with my S3.
It says 0.7A on it, while it appears that other have one with 1A.
Did they con me with this adapter?
And regarding the maximum current allowed: do you think an adapter of 1.2A might harm the S3?
Do not know where your S3 come from but this charger is not made For S3 but for S2!
I just checked the model number:
S3 charger: ETAOU81EBE
S2 charger: ETAOU10EBE (like yours)
And there is no cable on the S3 charger, it use the USB cable
Thank you for this!
I don't get it. The charger was inside the S3 box and looked original. Damn!
I think the store I bought from import their S3 from Germany, since it came with Vodafone German stock ROM. Is it possible that this is the charger they sell on German vodafon? Or perhaps the store switched it for some reason?
Mine also come from my carrier: french vodafone
Was your S3 box sealed?
Those words, "teg listrik" and "frekuensi" is written in Indonesian
Sent from my GT-P1000 using xda app-developers app
Hi,
Background - I am an electronic engineer and have designed power supplies.
The Amp rating on a power supply is it's maximum capability to deliver power. The Voltage is the 'force' that it can push electrons through the device, this is the important one to have correct. So a 5V 300A Power supply will not charge your S3 any quicker than a 5V 1A power supply.
Get yourself a 1A car charger and you'll be fine. Depending on how the data pins on that charger are configured it'll be recognised as either a fast or slow charger but it will be fine in any case.
So, according to what you say, there should be not problem to use a 5V 2A charger on the S3?
The charger cannot accidentally push too much current to the device?
No. The phone limits the Amp the battery can get.
It simply won't go above 0.5 or 1Amp depending on what resistor is coded between the data pins (the 2 middle pins on the normal USB-plug)
(Note that this does not extend to all devices. E.g. cheap chinese toys and their batteries may not have any current limter, connecting them to "too powerful" chargers will result in damages or potential blow-up of the battery. The same applies to batteries without any electronic such as car batteries which can overheat and "cook")
I bought S3 in Germany 1.0A, there is a date on the charger:18.05.2012
Matching charger to phone
burmo said:
Hi,
Background - I am an electronic engineer and have designed power supplies.
The Amp rating on a power supply is it's maximum capability to deliver power. The Voltage is the 'force' that it can push electrons through the device, this is the important one to have correct. So a 5V 300A Power supply will not charge your S3 any quicker than a 5V 1A power supply.
Get yourself a 1A car charger and you'll be fine. Depending on how the data pins on that charger are configured it'll be recognised as either a fast or slow charger but it will be fine in any case.
Click to expand...
Click to collapse
Hi burmo,
An interesting concept. I have no clue in these things but what you say is not clear to me "all the way".
Charging my i93100 phone with 5.0V 3.1A will do no harm because it won't "push" more than 1A anyway?
And who is "responsible" for controlling this "push" the charger/battery/phone?
Does it work the same for Car chargers?
Thanks a lot,
Izik
multimeter check on .7amp charger
Animor said:
I attach a picture of the adapter I got with my S3.
It says 0.7A on it, while it appears that other have one with 1A.
Did they con me with this adapter?
And regarding the maximum current allowed: do you think an adapter of 1.2A might harm the S3?
Click to expand...
Click to collapse
so i have been wondering about this as well because i am currently building a custom charger for my s3 that charges the battery without having to plug into the charging port. i have redirected wires from the wireless charging port to metal tabs i have place on the back of my phone. it is a "drop in charger".
Anyway i have tested the charger that came with my phone. I also have the samsung stock charger that say the output is .7amp but after testing it with mutimeter, i have found that the output is actually 1.2 amps. As for max charging amps, I am not sure. I have tested several chargers. The new S4 charger puts out 2.34amps and i have not found any problem charging my s3 with it.
TrollTollKarl said:
so i have been wondering about this as well because i am currently building a custom charger for my s3 that charges the battery without having to plug into the charging port. i have redirected wires from the wireless charging port to metal tabs i have place on the back of my phone. it is a "drop in charger".
Anyway i have tested the charger that came with my phone. I also have the samsung stock charger that say the output is .7amp but after testing it with mutimeter, i have found that the output is actually 1.2 amps. As for max charging amps, I am not sure. I have tested several chargers. The new S4 charger puts out 2.34amps and i have not found any problem charging my s3 with it.
Click to expand...
Click to collapse
As far as I know the phone limits it so as you've found yes you will be fine
My original S3 charger is 5v 1.0amp
My original S3 charger is 5v 1.0amp. It was bought in Thailand with the phone.
I agree with burmo an advanced phone will have a current limiter as part of its circuit, however I prefer not to rely on it and not to exceed the manufacturer volt/amp recommendation.
The phone controls the current. In custom kernels (Boeffla and so on) you can change the target current. The phone has a protection built in, if the voltage is unstable (drops to much) it lowers the current untill the voltage is stable.
A HTC One charger I sometimes use (0,7A rated) only delivers 0,8A. A aftermarket charger I own (1,0A rated) is fine delivering 1,2A (modified target current, not stock). These charging currents can be read by various apps.
Get yourself a 1,0A rated charger and speed up your charging time.
Benjamin
burmo said:
Hi,
Background - I am an electronic engineer and have designed power supplies.
The Amp rating on a power supply is it's maximum capability to deliver power. The Voltage is the 'force' that it can push electrons through the device, this is the important one to have correct. So a 5V 300A Power supply will not charge your S3 any quicker than a 5V 1A power supply.
Get yourself a 1A car charger and you'll be fine. Depending on how the data pins on that charger are configured it'll be recognised as either a fast or slow charger but it will be fine in any case.
Click to expand...
Click to collapse
Seconded the post above being an electronic engineer as wel.
Voltage should be exactly the same as you need, but this will always be the case for a USB charger.
Current should just be enough or more.
The charging current is dictated my your phone and not - and I repeat - NOT by your charger!
mine rates at 1A
Some reason the tablet thinks its always USB charging when using a wall wart even 2amp ones. I cant find the original charger anyway to increase the USB charging? I am not even asking 2amp maybe 750 to 1amp at least. So Basically I am asking can i increase the USB charging over the 500mah? I know the dangers but I dont plan on charging it from anywhere but wall wart.
ajac said:
Some reason the tablet thinks its always USB charging when using a wall wart even 2amp ones. I cant find the original charger anyway to increase the USB charging? I am not even asking 2amp maybe 750 to 1amp at least. So Basically I am asking can i increase the USB charging over the 500mah? I know the dangers but I dont plan on charging it from anywhere but wall wart.
Click to expand...
Click to collapse
Among several other improvements, the A1 kernel removes the charge rate restriction when you're not using the OEM charger.
Custom kernel will fool Android that it's OEM charger and icon would be as for "fast charging" power supply but the tablet will not get charge any faster then from simple usb (500mA).
You have to make cable for your after market charger. It's just couple resistors:
http://forum.xda-developers.com/showthread.php?t=1155065
Both given answers are a valid option for you, using A1 kernel or making a samsung impedance value adaptor cable. You can also find one of these adaptor in Amazon, and some external usb batteries provide this adaptor.
If the usb port is able to provide more than 500 mA, it will provide it; if don't, the port will not give charge, neither 500 mA, just 0 mA, because the over-current cut system (if your device ir PC hasn't this system, it will be burnt.
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I have some good experience with the A1 Kernel v1.8.4 for my P4. USB-charging is working without any problem.