I accidentally plugged in an old micro USB ac adapter that only provides 0.18A, I unplugged it after about 1min, could I have damaged anything?
I know you're supposed to have at least 1A.
pookguy88 said:
I accidentally plugged in an old micro USB ac adapter that only provides 0.18A, I unplugged it after about 1min, could I have damaged anything?
I know you're supposed to have at least 1A.
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No. The phone will draw what it wants, and the supply will try to supply it. if anything, it would have broken the supply. And there is no minimum charge current. Off the wall the phone will try and draw just over 1A, and the OEM wall charger can supply that. In USB, unless modified, the phone will only draw 500mA, because that is the USB power specification.
Like Flynny wrote, under-amping (as well as over-amping) does not hurt. The charger electronics are built into the phone and it manages the currents as it sees fit.
Over-volting is a different issue, though.
Related
I've tried searching, but came up with nothing (not even on Google).
It seems to me that my HD2 charges up much quicker when connected to the mains than it does when charging via USB - is this correct ? I'd prefer to only charge via USB as, that way, the phone is still syncing, but it sometimes takes forever to get to full charge that way.
Just wanted to get others' opinions on this.
wilsojer said:
I've tried searching, but came up with nothing (not even on Google).
It seems to me that my HD2 charges up much quicker when connected to the mains than it does when charging via USB - is this correct ? I'd prefer to only charge via USB as, that way, the phone is still syncing, but it sometimes takes forever to get to full charge that way.
Just wanted to get others' opinions on this.
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The wall charger charges at 1 amp.
USB, with a powered USB socket, will max out at half that due to the 500mA standard that USB uses.
So, in theory, it should take twice as long to charge on USB alone.
Plus the 500mA limit on USB is spread across several physical ports, so if you have anything else plugged in then you'll be charging at an even lower rate.
Good to know - thanks, guys - I learnt something new today
Guess I'll charge via mains going forward.
Thanks again !
plus when connected to active sync the phone is on, when its I wall charger it will be on standby.
Despite HTC shipping a 1A charger (which is the most I've ever seen for a USB charger) Lion battery prefer not to get cooked while charging and would last longer if charged at 500ma.
rp-x1 said:
The wall charger charges at 1 amp.
USB, with a powered USB socket, will max out at half that due to the 500mA standard that USB uses.
So, in theory, it should take twice as long to charge on USB alone.
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samsamuel said:
plus when connected to active sync the phone is on, when its I wall charger it will be on standby.
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Exact, the phone actually limits what it draws from an USB port to about 450mA (some safety margin). Then, is stays powered on and active (due to ActiveSync running), drawing approx 100mA. So it actually charges at about 450-100= 350mA, taking ridiculously long (4-5h) to charge. With the supplied charger it charges at 850mA.
Aterlatus said:
Plus the 500mA limit on USB is spread across several physical ports, so if you have anything else plugged in then you'll be charging at an even lower rate.
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Wrong, each port gets 500mA.
airwater9 said:
Despite HTC shipping a 1A charger (which is the most I've ever seen for a USB charger) Lion battery prefer not to get cooked while charging and would last longer if charged at 500ma.
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Li batteries support 1C charge without drawback (would be 1.32A for the HD2's battery).
Wrong, each port gets 500mA.
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Incorrect. The USB standard requires 500mAh nominal at any port when used alone. Manufacturers then decide whether they will "over specify" or not. You will not get 2mAh from a 4 port USB bus unless the internal power supply its built for it and many are not. Current is drawn by the device and if the draw exceeds the supply rating then there is a shortfall to all devices. It all depends on how well the equipment is specified and there its wide variation.
More details about charging here
pa49 said:
Incorrect. The USB standard requires 500mAh nominal at any port when used alone.
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Read page 171 of the USB 2.0 specification:
Root port hubs: Are directly attached to the USB Host Controller. Hub power is derived from the same
source as the Host Controller. Systems that obtain operating power externally, either AC or DC, must
supply at least five unit loads to each port. Such ports are called high-power ports. Battery-powered
systems may supply either one or five unit loads. Ports that can supply only one unit load are termed lowpower
ports.
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A port is either low power, in which case it can supply 1 unit load (100mA), or high power, which can supply 500mA. There's no spreading between ports, for each port if it's a high power one it must be able to supply 500mA at any time, if it's a low power one it will never provide more than 100mA. So there's no such thing as one that provides 500mA if used alone and less if others are connected... or the manufacturer is violating the spec.
Note that low power ports pretty much don't exist on PCs. They can be found on multimedia players with host function for example, which are just good to power a USB key or card reader.
Further on the page you can see that with hubs that don't have external power, the output ports are required to be low power ones, so that a 4-port hub can give one of the 5 unit loads it receives to each port, plus one for its own power, so you can't draw 500mA on any port of a bus-powered hub and be within spec.
Now if you could refrain from misleading users... can't count anymore how many times I've corrected you on your firm affirmations...
Do the phones charge faster plug into the wall then plug into a usb port on a computer?
Yes. The wall charger outputs more amps than the usb port on your pc.
Im not sure but my phones been charging slower than before. i was running damage control 2.05 and charging was quick. But with Fresh 2.0d i feel like it charges slower. anybody else? or just me.
Rsoehelk said:
Im not sure but my phones been charging slower than before. i was running damage control 2.05 and charging was quick. But with Fresh 2.0d i feel like it charges slower. anybody else? or just me.
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I sort of feel this too, especially charging on the USB port. It seems to take hours to get a green LED.
your computer, and most aftermarket chargers, have usb ports with 500 mA power. The USB charger that came with the phone, and most iphone usb chargers, are 1A (or 1000mA)
I've been thinking, and I don't know for sure if it will work, but sounds good in theory, if you could splice in another usb end on the power +/- 5V only (outer wires I think?), and plug it into another usb port that is not shared with the other one, to double the amperage. After all, it would be wired in parallel then... just not completely sure if it would fry the computer but I don't think so
winmo has a fastcharge hack that i would love.
it charges through usb at the same speed as the wall.
danaff37 said:
your computer, and most aftermarket chargers, have usb ports with 500 mA power. The USB charger that came with the phone, and most iphone usb chargers, are 1A (or 1000mA)
I've been thinking, and I don't know for sure if it will work, but sounds good in theory, if you could splice in another usb end on the power +/- 5V only (outer wires I think?), and plug it into another usb port that is not shared with the other one, to double the amperage. After all, it would be wired in parallel then... just not completely sure if it would fry the computer but I don't think so
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Click to collapse
Wish I could find my stock charger.
Fresh 2.0d definitely charges slower via the wall wart. I noticed this right off the bat. Don't know why.
My battery discharged while I was travelling - it went to <10% and shut off by itself. I left the original HTC microusb over seas and so I used my old Motorola microusb to try to charge the phone. After leaving it overnight a number of times I thought the battery was dead. I ordered a new battery (from Mugen) and tried to charge that.
All I get is a flashing orange/red light. The phone does not turn on.
I have tried charging on both the AC charger and via PC usb port.
Are all MicroUSB cables universal? I can't get a straight answer about this from HTC's customer support. Every time I call someone gives me a different answer which leads me to believe that they have no clue what they are talking about.
Is there anything I can do to remedy this?
The HTC AC charger is rated at 5V 1A, while my old Moto charger is rated at 5.1V 850mA. Could I get a charge by using slightly higher voltage with lower amperes?
I really would like to avoid sending it back to manufacturer warranty so if there is any other alternate route I can take please let me know.
I have some cheap MicroUSB cables and they seem to charge very slowly compared to the HTC one. There may be a difference, but I suspect the cheap cables are just plain cheap.
No the Motorola charger wont have done it any harm, 0.1volt wont make a difference, and charging at a lower current is less likely to cause damage.
Could I have damaged the phone by using a different companies' cable?
Is there a chance that the phone is FUBAR? Should I be able to turn it on if its plugged into a power source even if the battery is dead?
please excuse the bump
need to know
*bump*
I've actually tried all the different combinations of charging and they all seem to work fine
I've tried a cheap microUSB cable with the official charger, official microUSB cable with iPhone charger, cheap microUSB cable with PC, another cheap microUSB cable in my friend's car, and even a Nokia microUSB cable in all the mentioned combinations
They all just gave different current readings (from CurrentWidget) but in the end they all worked well. I'm not sure if a Motorola microUSB would have modifications that cause incompatibilities though
I also tried different Micro-USB Cables and my DHD still works normally.
me too have the same problem. I got a total of 3 diff USB cable. One give me 330mA, one give me 120mA and one gave me only 50mA. i do not mind spending the money if i know how to choose a USB cable which can give me 330mA everytime i charge. Anyone knows how to spot the correct ones?
Neurosis said:
me too have the same problem. I got a total of 3 diff USB cable. One give me 330mA, one give me 120mA and one gave me only 50mA. i do not mind spending the money if i know how to choose a USB cable which can give me 330mA everytime i charge. Anyone knows how to spot the correct ones?
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Any Blackberry USB cable should work..
used Motorola cable many times. No issues.
Might be a fluke that u busted ur phones charging system.
The USB cables are all the same and have no effect on charging current. The charging current is determined by how the two data lines within the cable are terminated in the charging device. If the data lines are left open ciruit, the phone interprets this as being a USB charger and will therefore only draw a maximum of 500mA to prevent damage to a PC's USB port. Chargers that are capable of delivering more current (such as a wall charger) connect the two data lines together. The phone then interprets this as being a charging device which is capable of delivering a higher current and will draw greater than 500mA. If you look at "Menu - Settings - About phone - Battery" it will state either "Charging (USB)" or "Charging (AC)" depending on what you are charging from.
I have a MT4G as well as the typical HTC charger from it's package.
When I charge the phone using that HTC charger, it charges very quickly, obviously in fast charge mode.
My issue is that I need to be able to charge my MT4G when I'm not around an outlet, so I put together a system to give me 5V from an RC plane lipo battery, which can be pumped into the USB port on the phone.
I can charge normally off this, but I can't seem to get the phone to fast charge, no matter what I do.
I probed the HTC charger, and it appears to pull D+/D- up to 3.3V, which is exactly what I am doing on my charger.
If you probe my charger and the HTC charger, they appear totally identical. 5V coming out USB Vcc, 3.3V out of D+ and D-. The phone says it is in "AC charging mode" with both chargers, however it only draws 130mA from my charger, not nearly enough to _actually_ be fast charging.
Any ideas on how to force it to really fast charge?
Short D+ and D-. Don't pull them up.
Jack_R1 said:
Short D+ and D-. Don't pull them up.
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Click to collapse
Also tried that, also tried shorting them with a low value (70R) resistor. Still says AC mode, but still doesn't fast charge.
Hmm..
http://forum.xda-developers.com/showthread.php?t=844284
This also says to short the 2 data pins and nothing more.
If you find out that there's something else needed - please share.
Ok I recently found my TF101 losing the quick charge capabilities, so I went on and on to find the rootcause, the charging cable at the end of the tablet has some tiny broken piece at the round plastic part and it's no way to defect the cable..
Another issue, my 15month son once time chewed the charging cable over the proprietary connector side while the plugged in the wall (no harm since it is 5v, 2.1A), it was wet but hair dryer did the job
After that I plugged the charging cable to the ac adapter, tablet...but now the thunderbolt charging icon won't show up but charging very very slow (called trickle charge) - 12hr for 100%...
Lucky for me, my co-worker uses TF101 too, so I borrowed his ac and charging cable to test...FINALLY, it was the charging cable
So everyone else,,, I guess if you suspect your AC Adapter fried or something, just try to charge your phone, if it works, it works - the charging cable can be defected and degraded so it will charge fast or slow depending the CHARGING CABLE as well - it's ironically found but I now had to believe CHARGING CABLE is also another factor in this equation rather only AC Adapter itself!
good luck!
rcjpth said:
So everyone else,,, I guess if you suspect your AC Adapter fried or something, just try to charge your phone, if it works, it works - the charging cable can be defected and degraded so it will charge fast or slow depending the CHARGING CABLE as well - it's ironically found but I now had to believe CHARGING CABLE is also another factor in this equation rather only AC Adapter itself!
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I wouldn't recommend plugging in any other usb rechargeable device into the Asus AC adapter because it outputs 10V if I remember correctly.
Unless you KNOW the device you are plugging in can handle the output voltage from the ac adapter, DO NOT PLUG IT IN because you run the risk of frying your device.
Spd2Last said:
I wouldn't recommend plugging in any other usb rechargeable device into the Asus AC adapter because it outputs 10V if I remember correctly.
Unless you KNOW the device you are plugging in can handle the output voltage from the ac adapter, DO NOT PLUG IT IN because you run the risk of frying your device.
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Click to collapse
It uses a USB3 pin to detect the TF, and ups it to 15v at 1.2a. Unless it can detect the TF USB3 pin, it only outputs 5v at 1.x or 2.x amps (I forget the exact number).
I had JUST finished reading about that in some other thread and was coming here to correct myself. You beat me to it by a few minutes.
rcjpth said:
Ok I recently found my TF101 losing the quick charge capabilities, so I went on and on to find the rootcause, the charging cable at the end of the tablet has some tiny broken piece at the round plastic part and it's no way to defect the cable..
Another issue, my 15month son once time chewed the charging cable over the proprietary connector side while the plugged in the wall (no harm since it is 5v, 2.1A), it was wet but hair dryer did the job
After that I plugged the charging cable to the ac adapter, tablet...but now the thunderbolt charging icon won't show up but charging very very slow (called trickle charge) - 12hr for 100%...
Lucky for me, my co-worker uses TF101 too, so I borrowed his ac and charging cable to test...FINALLY, it was the charging cable
So everyone else,,, I guess if you suspect your AC Adapter fried or something, just try to charge your phone, if it works, it works - the charging cable can be defected and degraded so it will charge fast or slow depending the CHARGING CABLE as well - it's ironically found but I now had to believe CHARGING CABLE is also another factor in this equation rather only AC Adapter itself!
good luck!
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Click to collapse
I'm glad you found your problem. So should we disregard your last 4 posts of Asus conspiracy and faulty TF and Dock FW updates?
No mann - I believe they already planted the conspiracy around us - see we are all in purchasing the TF101 - now we need to spend more money for the accessories ...etc - you see how they lure us into this kind of sh(*&()&)(*&
rcjpth said:
Another issue, my 15month son once time chewed the charging cable over the proprietary connector side while the plugged in the wall (no harm since it is 5v, 2.1A), it was wet but hair dryer did the job
Click to expand...
Click to collapse
You let your 15 month old son crawl around unshielded power sockets and plugged-in power cables with little enough supervision that you couldn't stop him before he was already chewing on it?????