Hey,
Just got my phone 2 days ago. I charged it twice fully so far.
When it was fresh out of the box it only had around half a charge; I let it die fully and then charged it over night when I went to bed.
Next day let it die and then today charged it while I was at work via the USB cable connected to the computer. It took aprox 7 hours to charge from 0 - 100%. This seems freakishly long?!
My old iPhone 3G charged in 2 - 3 hours fully; if not less.
Is this abnormal?
I've never done the charging with the USB connected to the cable. But from reading the forums here, I understand that charging via the computer takes longer as compared to charging via a wall outlet.
Power output from computer is 5v...
Socket (in uk) nearly 50x that.. Other places at least 20x....
Go figure ;-)
yetep said:
Power output from computer is 5v...
Socket (in uk) nearly 50x that.. Other places at least 20x....
Go figure ;-)
Click to expand...
Click to collapse
That's not how it works...a socket still charges at 5V, but provides higher current.
Mine usually takes about the same amount of time form 0% through USB, but if you do it through the wall charger, it's about half that time...
it's not the voltage but it's the number of milliamps (mA) that determines how fast the phone will charge. USB ports output at most 500 mA while the stock charger outputs 700-750 mA (i can't remember the exact number).
There was me thinking I was clever lol
Sent from my X10i using XDA App
azian_advanced said:
it's not the voltage but it's the number of milliamps (mA) that determines how fast the phone will charge. USB ports output at most 500 mA while the stock charger outputs 700-750 mA (i can't remember the exact number).
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He's right. The stock charger's output is 700mA. If it were higher, the battery would overheat and could potentially damage it. My macbook's USB port outputs about 325mA, so it should take about half the time on an AC wall plug.
duh, of course. Why didnt I think of that ..
Thanks guys
The mA rating of the charger itself doesn't matter that much. As long it can provide the current (mA) the device needs it'll suffice.
5 volts - 1000 mA charger or a 5 volts 100 000 000 mA charger. They both provide the needed current the device need to draw, and the device will cahrge just as good on the 100 000 000 mA one.
The device has two charging modes: "Slow charge" and "Fast charge"
These two modes are needed due to the USB port standards.
A normal computer USB port can only provide 500 mA at a maximum.
A power-enhanced USB port can provide much more.
Chargers following the microUSB charging standards, are in fact Power-enhanced USB-ports (but with the computer stripped away. )
The device can sense what kind of port it's connected to, depending on how the data-pins in the USB-plug are configured.
If it's a normal USB port, it enters "Slow charge" mode to prevent overloading the USB port (which would cause the USB-port to shut down)
Here the device only draws a limited amount of current due to the limited mA rating of the USB-port.
If it's a Power-enhanced USB port, it enters "Fast charge" mode.
Here the device draw the needed current to charge the battery as fast as safely possible.
See the mA rating as "maximum power available".
A 100 000 000 mA charger wont force the device to charge in 2 seconds, it just have 100 000 000 mA available.
It's up to the devices how much power they need to draw.
There is a "failsafe": If the device cannot draw the current needed for "Fast charge" it will revert back to "Slow charge", and if that's not possible, it simply won't charge at all.
There are two kinds of USB chargers/power supplies:
The "Real deal": It's designed to be a charger and follows the full standards for USB-charging.
The "Dumb one": This one is only designed to be a power supply for "dumb devices", such as USB toys, simple devices, external harddisks etc...
They both look alike, but the difference are one of them are designed do be a charger, the other one a dumb power supply.
Phones usually cannot charge from those "dumb ones" without some modification.
The dumb one can be modified to act as a charger, fooling the device thinking it's a charger:
This modification can be easily done via an adapter or simply modifying the cable itself.
Simply short the Data pins, or sink them to the +/- wires with 10 kOmhs resistors.
Related
I have a mini usb lead with me but not the exec charger. Can I just plug this into an IPOD or Blackberry charger and will this charge it?
I think you can without problem...
However, there is a small issue:
The usb standard specifies a maximum 500mA current for the usb supply (over 5V), but to charge the Universal in a reasonable amount of time more is necessary (The supplied one is 1A)
I succesfully charged the battery using a motorola psu, and in the same way you can charge it leaving it attached to the PC usb port.
I am pretty sure there is no risk for the phone but it is possible to overload the power supply - you better check it does not run too hot. Also, put the phone in flight mode and turn it off, to minimize the amount of total power used
I think you can without problem...
However, there is a small issue:
The usb standard specifies a maximum 500mA current for the usb supply (And 5V), but to charge the Universal in a reasonable amount of time more is necessary - The supplied one is 1A - I succesfully charged the battery using a motorola psu.
I am pretty sure there is no risk for the phone but it is possible to uverload the power supply - you better check it does not run too hot. Also, put the phone in flight mode and turn it off, to minimize the amount of total power used
ciaranfo said:
I have a mini usb lead with me but not the exec charger. Can I just plug this into an IPOD or Blackberry charger and will this charge it?
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Not sure which ipod charger you talking about, personally i use the original one from apple (white with the USB plug) and it wks fine. The original charger for universal also has the same current rating of 1A @ 5V so I guess it shouldn't overload it.
Yes, I charge my Universal with a BlackBerry charger from time-to-time.
Keep in mind what TheDayOfCondor said about the original charger putting out 1 amp while the BlackBerry charger is only rated for 0.5 although I haven't had any issues.
right, that's good to know. thanks.
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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Click to collapse
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...
I find my Mini charges slower (switched off) when connected to my pc than using the supplied powerpak - would this be correct?
yep..i noticed that too
Yep, but that is with almost al phones charging through usb ports. Each phone I have had before which could charge through usb, charges considerably faster through the wall plug.
Thanks for confirming guys!
charging power of USB
The USB 2.0 of a computer supplies 500 mA @ 5V at most. The HTC power supply is rated 1000 mA @ 5V (read the label).
I had a charger for in the car. It supplied just enough power for lighting the "charging" LED on the phone but didn't charge actually. After a week and a half, the battery was empty...
AgedTeaSee said:
The USB 2.0 of a computer supplies 500 mA @ 5V at most. The HTC power supply is rated 1000 mA @ 5V (read the label).
I had a charger for in the car. It supplied just enough power for lighting the "charging" LED on the phone but didn't charge actually. After a week and a half, the battery was empty...
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I'm sorry I did not understand, your battery is holding 10 days?
he charged it in a car, with a car-cable. but the amperage was too low to charge the phone to 100% ; instead it justsupplied just enough energy to keep it alive for 10 days.
but bro: turning phone off for a few hours didn't help?
I'm not sure if this has been noted elsewhere but I couldn't find it if it was.
I ran into the problem yesterday in which my HD2 running WP7 would drain the battery if connected to the PC USB port instead of charging it. This was the first time my phone had done this and restarting the phone and switching USB ports did not result in any difference.
On a whim I decided to look in my device manager and there was an unknown device listed there. I selected it and had is search for and install the drivers and now it listed as USB Composite Device. Once that was done, the phone charged as normal.
jaxjaguar said:
I'm not sure if this has been noted elsewhere but I couldn't find it if it was.
I ran into the problem yesterday in which my HD2 running WP7 would drain the battery if connected to the PC USB port instead of charging it. This was the first time my phone had done this and restarting the phone and switching USB ports did not result in any difference.
On a whim I decided to look in my device manager and there was an unknown device listed there. I selected it and had is search for and install the drivers and now it listed as USB Composite Device. Once that was done, the phone charged as normal.
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My phone's listed as Windows Phone USB, which i think is cool, but stll not enough!
Charging takes hours...
stealth21 said:
My phone's listed as Windows Phone USB, which i think is cool, but stll not enough!
Charging takes hours...
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that depends on the charging source.
if you use a laptop you will only be getting 200-300mA of current, a normal PC USB port will give you around 500mA, the wall charger will give you 1A (1000mA)
Now its not as simple as that as the device uses some of that power for working as we cant charge whilst off, so knock 100mA off it if the screen is on, on standby it'll be minimal so forget that.
1A charger should get you charged in ~1.5 hours
PC will double it to ~2.5 hours, some PCs do have 1000mA ports so say ~1.5-2.5 hours)
laptop could be ~4-6 hours (some laptops do have 500mA ports so say ~2.5-6 hours)
note you can get 2A quick chargers (~35min-45min, but i would be very careful with those an can ultimately lead to a shorter life span of the battery
dazza9075 said:
that depends on the charging source.
if you use a laptop you will only be getting 200-300mA of current, a normal PC USB port will give you around 500mA, the wall charger will give you 1A (1000mA)
Now its not as simple as that as the device uses some of that power for working as we cant charge whilst off, so knock 100mA off it if the screen is on, on standby it'll be minimal so forget that.
1A charger should get you charged in ~1.5 hours
PC will double it to ~2.5 hours, some PCs do have 1000mA ports so say ~1.5-2.5 hours)
laptop could be ~4-6 hours (some laptops do have 500mA ports so say ~2.5-6 hours)
note you can get 2A quick chargers (~35min-45min, but i would be very careful with those an can ultimately lead to a shorter life span of the battery
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Thanks for quick reply, i tried computer it took so long..
Although I'm using wall charger nowadays it takes more then 3-4 hours. Theres something wrong, When i had winmo6.5 the device was fully charged in 2.5 hours...
stealth21 said:
Thanks for quick reply, i tried computer it took so long..
Although I'm using wall charger nowadays it takes more then 3-4 hours. Theres something wrong, When i had winmo6.5 the device was fully charged in 2.5 hours...
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yeah that doesnt sound right, the battery its self is only 1230mA, the wall charger is 1000mA on standby within WP it should draw any more than 10mA but lets say 100mA on the extreme side, that gives you a net gain of 900mA every hour which is like 1 hour 20min.
I assume its the 1A charger that came with the device? check the adaptor and see what the current output is listed as
according to your figure of 3 hour charge time ( again, assuming from flat) that means its dumping around 400mA in to the battery an hour. That means one of two things
Firstly that your device is using an incredible 600mAh, that would be toasty and is unlikely!
Secondly, the charger isnt putting out 1000mA, more likely 500mA or 300mA
I suppose there is a third option, something gone wrong in the device its self, i cant think why it would tho, try running it near flat, restart it, make a note of the battery level then restarting again (you restart twice because WP on the HD2 has battery reporting issues) hold down the VOL down button on reboot which will take you in to the bootloader.
plug in the charger and leave for half hour, go back to windows and look at battery (remember to set the clock properly again!)
if the charger is 500mA it will have only charged to just less than 1/3
if its 1A it will be just less than 2/3 maybe half
the point of doing it in the bootloader is that you rule out WP and its dodgy drivers and will help to narrow down the problem
Check charge current in Battery tool apps. Battery current - positive figures are charging current.negative discharge.
To get high charging current(more than 200 ma) from power suply(wall or car) usb data lines must be shorted(fast charging mode). On ploperly made power supplies usb data shorted and phone can suck high current(700-800ma normaly not more).
Even if on charger written 1000ma it doesn't mean phone wil take all. what is written on charger - it is max allowed.
zcdg said:
Check charge current in Battery tool apps. Battery current - positive figures are charging current.negative discharge.
To get high charging current(more than 200 ma) from power suply(wall or car) usb data lines must be shorted(fast charging mode). On ploperly made power supplies usb data shorted and phone can suck high current(700-800ma normaly not more).
Even if on charger written 1000ma it doesn't mean phone wil take all. what is written on charger - it is max allowed.
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Indeed, although from my own tests it draws around 900mA, there is a large number of variables including power fluctuations on a dirty line regulated supplies, state of the battery, etc, its safe to play with estimates I think in this case without overcomplicating things, but the fact remains, on a wall charger that comes with the HD2 it should fully charge in around 1.5 hours unless it is not the same charger or something is wrong with it.
dazza9075 said:
Indeed, although from my own tests it draws around 900mA, there is a large number of variables including power fluctuations on a dirty line regulated supplies, state of the battery, etc, its safe to play with estimates I think in this case without overcomplicating things, but the fact remains, on a wall charger that comes with the HD2 it should fully charge in around 1.5 hours unless it is not the same charger or something is wrong with it.
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yes, with correct wall or car charger it charges in about 1.5 hours from almost empty to full.
At home I have an iPhone 5 charger and a Blackberry Bold 9900 Charger along with a Cooler Master Battery Bank. The out put on the battery bank claimed 5 Volts 2.1 Amps but when hooked up to my HTC One it showed USB Charging. I hooked it up via my iPhone 5 charger which has an output of 5 Volts and 1A and also got USB Charging but when I hooked it up via Blackberry Charger with an output of 5V / 750 mA I got Charging (AC) on my HTC One. Looks like it won't accept any higher power input than what it needs for faster charging.
Picture posted is via Blackberry Charger.
Here is a picture via Cooler Master Battery Bank showing charging (USB)
The maximum current is drawn when the battery is empty. The first phase of charging is constant current, where it will draw up to 1A from AC and 500ma from USB, then moves to constant voltage, where the current will drop off. Your battery is probably too charged to be drawing max current.
HTC phones switch to AC charging when the data pins on the USB are shorted, otherwise it's USB charging.
BenPope said:
The maximum current is drawn when the battery is empty. The first phase of charging is constant current, where it will draw up to 1A from AC and 500ma from USB, then moves to constant voltage, where the current will drop off. Your battery is probably too charged to be drawing max current.
HTC phones switch to AC charging when the data pins on the USB are shorted, otherwise it's USB charging.
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I need to double check which USB cable I had used. At work now but just saw that the USB cable I had at work was the Blackberry USB Cable and when I hooked that one up with my new HTC ONE I got AC Charging on my HTC ONE. A sales person had told me that the USB cable can make a difference at times. Will try messin around with a few wires along with my Cooler Master Battery Bank to see if the results change.
desiregeek said:
I need to double check which USB cable I had used. At work now but just saw that the USB cable I had at work was the Blackberry USB Cable and when I hooked that one up with my new HTC ONE I got AC Charging on my HTC ONE. A sales person had told me that the USB cable can make a difference at times. Will try messin around with a few wires along with my Cooler Master Battery Bank to see if the results change.
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I find that the charger it came with charges it fastest. The other chargers I have used are my neuxs 4 and gs4.
The phone is looking for a 'short' across the two data wires, I believe. The HTC chargers have this so that the phone knows it's not a USB port that isn't able to deliver the current. I'm surprised the blackberry charger fooled the phone to think it's AC.