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i bought that Motorola Rapid Car charger recent and have been using it about a week now. i've noticed that it doesn't seem to charge my Thunderbolt any faster then it did when i was using the Thunderbolt's USB cable with this USB car charger adapter.
so, my question is, why is it called "rapid" if it doesn't charge any faster?
and i suppose secondly, is there an actual microUSB charger that will charge the Thunderbolt faster?
they make one for the iphone that will fully charge it in 30 minutes so i know they are out there.
voxigenboy said:
i bought that Motorola Rapid Car charger recent and have been using it about a week now. i've noticed that it doesn't seem to charge my Thunderbolt any faster then it did when i was using the Thunderbolt's USB cable with this USB car charger adapter.
Click to expand...
Click to collapse
Maybe you should try this one.
Install the battery monitor widget. Monitor the battery for about 20 minutes while charging. Tell us what the charge current is.
Does the Motorola charger include a cable? If not, you may just have a weak cable. I have seen cheap cables with wire so thin that the charging current is no better then charging off a weak USB port.
My experience has been that the phone typically recognizes car charges as USB charging and uses a different charging profile. My solution to that is use a wall charger through an inverter or a kernel that doesn't use radically different charging profiles for A/C and USB.
loonatik78 said:
My experience has been that the phone typically recognizes car charges as USB charging and uses a different charging profile. My solution to that is use a wall charger through an inverter or a kernel that doesn't use radically different charging profiles for A/C and USB.
Click to expand...
Click to collapse
No need for that.
Cut a small piece of aluminum foil. Carefully place it where it shorts the two center conductors in the charger. Plug the USB cable into the charger. Make sure the foil stays in place over the two center conductors.
It is now a high rate charger. (assuming it can put out 1 amp.)
The limiting factor is typically the usb cable itself. Most usb cables can't support the 1amp that is provided to it. Since you used the original usb cable that came with the thunderbolt (that's been "shorted" as mentioned above" ) it will be just as fast as the moto car charger. the 1amp charging rate that the moto charger charges at (i have one) and that the original one charges at are already "rapid". if you plugged a normal usb cable from somewhere else into the other usb car charger, it'd be much much slower
squeakyl said:
The limiting factor is typically the usb cable itself. Most usb cables can't support the 1amp that is provided to it. Since you used the original usb cable that came with the thunderbolt (that's been "shorted" as mentioned above" ) it will be just as fast as the moto car charger. the 1amp charging rate that the moto charger charges at (i have one) and that the original one charges at are already "rapid". if you plugged a normal usb cable from somewhere else into the other usb car charger, it'd be much much slower
Click to expand...
Click to collapse
The stock charger is what shorts the connections. The cable is NOT shorted on the two inner pins because they are the data connections used for connecting your phone to a computer.
doodlebro said:
The stock charger is what shorts the connections. The cable is NOT shorted on the two inner pins because they are the data connections used for connecting your phone to a computer.
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Click to collapse
To meet the USB charging spec (which the TB uses), the two inner (data) contacts should be shorted with no more that 200 ohms.
But, the cable can also be an issue for rapid charging. The voltage drop for a 1A/5V source, across only .5 M of 28 gauge copper is ~220 mV. If you use a longer cable, there's more voltage drop. The TB likely current limits itself when the voltage drops below a certain threshold. Best to buy 24 gauge USB cables, if you can, especially if getting longer ones (monoprice has them).
voxigenboy said:
i bought that Motorola Rapid Car charger recent and have been using it about a week now. i've noticed that it doesn't seem to charge my Thunderbolt any faster then it did when i was using the Thunderbolt's USB cable with this USB car charger adapter.
so, my question is, why is it called "rapid" if it doesn't charge any faster?
Click to expand...
Click to collapse
I think its a matter of rated output current. BUT on the other side, the phone must be capable of drawing/using that much current. If the adapter is rated for more current than the phone can charge, the "extra" current wont be supplied.
Initially, Moto's standard car chargers output 5V and up to 550ma max (just like a standard PC USB port) so they didn't charge phones all that fast. Moto then came out with chargers that had higher current output, so they were capable of charging the phones "faster" than the original car chargers (but on par with the home/travel/AC chargers) and called them "rapid car chargers"..
Today, the current output on the Moto SPN5400A car charger is 0-950mA, and I've seen it sometimes referred to as "Rapid Car charger."
But as far as I know, Moto no longer makes/sells the lower current car chargers, and their web site only shows one MicroUSB and one MiniUSB car charger for sale, both of which appear to be of the 0-950mA output variety.
voxigenboy said:
and i suppose secondly, is there an actual microUSB charger that will charge the Thunderbolt faster?
they make one for the iphone that will fully charge it in 30 minutes so i know they are out there.
Click to expand...
Click to collapse
Just because someone makes such a charger for the iPhone, doesn't mean one must exist for the TB, or other phones, does it? I know the iPad uses a 2A charger. What happens if you connect an iPhone to that? will it charge faster? I guess that depends on if the iPhone is capable of drawing more than 1A to charge it.
I've not seen a "home" or AC charger that can charge the TB any faster than the Stock 1A charger. Does such a thing exist?
A proper car charger with 950mA to 1A output should charge the TB at almost exactly the same rate as the stock 1A wall/AC charger.
And btw, the Moto SPN5400A car charger DOES charge my TB in about the same amount of time that it takes me to charge my TB at home with the stock HTC charger. So while its not "rapid" compared to the stock home/travel/AC charger, its "rapid" compared to PC USB Port charging, or a plain lower current car charger.
KidJoe said:
I've not seen a "home" or AC charger that can charge the TB any faster than the Stock 1A charger. Does such a thing exist?
A proper car charger with 950mA to 1A output should charge the TB at almost exactly the same rate as the stock 1A wall/AC charger.
Click to expand...
Click to collapse
I made a charger for my motorcycle. I use it as a GPS, screen on MAX, phone active with marginal signal. And I wanted to actually charge the battery at the same time. I did a lot of experimenting with the Thunderbolt. It would not exceed a pull of about 850ma from the supply, even at 5.5 volts. IMHO, you are wasting time looking for any charger over 1 amp.
Also, even with about 850ma in, not much over 500ma is getting to the battery. So a totally dead battery is still going to take between 2 and 3 hours to charge, no matter what charger you have. And twice that long if the charger looks like a PC USB port.
worwig said:
I made a charger for my motorcycle. I use it as a GPS, screen on MAX, phone active with marginal signal. And I wanted to actually charge the battery at the same time. I did a lot of experimenting with the Thunderbolt. It would not exceed a pull of about 850ma from the supply, even at 5.5 volts. IMHO, you are wasting time looking for any charger over 1 amp.
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Click to collapse
I was asking because of the OP's statement about knowing "they must exist" because they are out there for the iPhone.
I'm perfectly happy with my Moto car charger, and how fast it charges my phones.
Is it me or does this thing not charge while in use? I'm using the a/c adapter btw
It works for me when hooked up to my laptop. It goes slower depending on how many resources are being used. My G1 wouldn't charge while navigation was on for instance and my Nexus S barely charged at all while I was navigating.
Sent from my Galaxy Nexus using xda premium
All I'm doing it texting and surfing. I' trying to charge it before I board my 8 hour flight to Europe. I have two movies on here I want to watch and the charge has only gone down since I plugged it in. It just slows down the rate. I'm starting to think my Galaxy Nexus is a dud. I barely get 9 hours with light use. My brightness is always below halfway.
I guess I'm alone on this issue, or nonissue I should say
With the AC adapter that doesn't happen to me but with the car adapter I can't figure out a way for it to charge instead of lose battery while using Navigation and Bluetooth. All car chargers are detected as USB and I have tried several adapters... (purchased and returned 3 different adapters including Samsung one and have 3 other adapters myself)
bump......
Not charging while on car charger
I'm having the same issue. I find it difficult to believe there are a limited number of us with this problem.
dagoat said:
I'm having the same issue. I find it difficult to believe there are a limited number of us with this problem.
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Click to collapse
Are you using the AC charger that came with the phone or an old one/third party? You could be running into the same issue as the guy with the car charger(see below). Not all microusb chargers are created equally.
PCC said:
With the AC adapter that doesn't happen to me but with the car adapter I can't figure out a way for it to charge instead of lose battery while using Navigation and Bluetooth. All car chargers are detected as USB and I have tried several adapters... (purchased and returned 3 different adapters including Samsung one and have 3 other adapters myself)
Click to expand...
Click to collapse
Make sure the car charger you're using is at least a 1AMP charger. Anything less than that and the phone will use a USB charging mode. You can see the ampage of a particular charger on the bottom/backside. Its usually in very small print but its there.
BTW the Galaxy Nexus can actually run off wall paper alone(i.e. no battery inserted) on a 2.1AMP charger that comes with most tablets these days. I use my Galaxy Tab charger for it!
Sent from my Galaxy Nexus
as unremarked said, you need a 1AMP car charger to get it to work. i had to buy a new one.
As far as the AC charger, the one that the phone came with i had issues charging, but i went back to a black berry charger i bought as a replacement for my nexus one, and i can be playing cordy on that and the battery stays charged.
I have a verizon charger leftover from my Droid 1 and I drove across the country a few days ago using navigation 100% of the trip. I also had a few hours of conversation and regularly streamed podcasts and music. I did all of this with the extended battery at a full charge always. The charger was never even noticeably warm. The trip took 3 days and I didn't charge over night so each day started below a full charge.
I suspect you have a problem with one of three things. Either the phone has a bad charging component, your battery is defective or your charger has less output than it claims.
Sent from my Galaxy Nexus using xda premium
Most USB chargers are only 500mA. Which isn't a lot considering it takes 2100mA just to keep it on.
Sent from my Galaxy Nexus using XDA App
It's happening again, I can't use this thing while charging. I put it in airplane mode and it still dies while I'm using it. It doesn't shutdown either, it just cuts off. It's plugged into the wall btw.
rashad1 said:
It's happening again, I can't use this thing while charging. I put it in airplane mode and it still dies while I'm using it. It doesn't shutdown either, it just cuts off. It's plugged into the wall btw.
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Click to collapse
Did you bother to read anything in this thread?
Sent from my Galaxy Nexus
Yeah I did. I've never had this issue with any phone that I've owned.
make sure it's charging in 'AC Mode' and put a chunk of dry ice underneath it w/ some protection in between.
you are welcome !
rashad1 said:
Yeah I did. I've never had this issue with any phone that I've owned.
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Click to collapse
If you did, then you'd realize its less likely an issue with your phone and more likely you're using a charger that doesn't push enough power to the phone.
Sent from my Galaxy Nexus
unremarked said:
If you did, then you'd realize its less likely an issue with your phone and more likely you're using a charger that doesn't push enough power to the phone.
Sent from my Galaxy Nexus
Click to expand...
Click to collapse
Its the one that came with the phone, 1A 500V, pretty standard these days.
A few comments:
All USB cables are not alike. Not all transmit the proper power. So with your AC adapter, you might try other USB cables to have the phone see it as "AC" and not "USB".
The Verizon car charger does work properly with the Galaxy Nexus, and is seen as "AC" power. Interestingly, if you use the 2nd USB port, even with a cable that does function correctly, it is still seen as "USB" and not "AC". So only the primary connection there will provide full power.
I'm also still looking for a car charger, other than Verizon's, that will be seen as "AC" - I'd get the Verizon one, but don't like the "curly" cord, since I'm duct taping it across my dash, and it's a lot more bulky than a regular straight cord.
Cheyse said:
Most USB chargers are only 500mA. Which isn't a lot considering it takes 2100mA just to keep it on.
Sent from my Galaxy Nexus using XDA App
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Click to collapse
If it takes 2100ma to keep it on it would never ever charge on any charger.
Also, considering the fact the battery is only 1750mah that mean the device would only stay on for around 45 minutes before being fully discharged if it wasn't plugged in.
Somehow your figures are a bit off.
---------- Post added at 09:34 AM ---------- Previous post was at 09:23 AM ----------
DLCPhoto said:
A few comments:
All USB cables are not alike. Not all transmit the proper power. So with your AC adapter, you might try other USB cables to have the phone see it as "AC" and not "USB".
Click to expand...
Click to collapse
How does a USB cable "not transmit the proper power?" What is "proper power" as opposed to "improper power?" Power goes through the RED wire in the USB cable. That's a USB spec. Either it carries current or it does not.
Some devices need to see 2 USB pins to be jumpered in order to set charge on (the Galaxy Tablet is notorious for this which is why you can buy a special cable adapter to create this jumpered charger pin if you are not using their "special" charger. This adapter allows you to to be able to charge the tablet off USB which it normally won't do, faking the tablet to make it think it's on the AC charger, albeit very slow).
MisterEdF said:
If it takes 2100ma to keep it on it would never ever charge on any charger.
Also, considering the fact the battery is only 1750mah that mean the device would only stay on for around 45 minutes before being fully discharged if it wasn't plugged in.
Somehow your figures are a bit off.
---------- Post added at 09:34 AM ---------- Previous post was at 09:23 AM ----------
How does a USB cable "not transmit the proper power?" What is "proper power" as opposed to "improper power?" Power goes through the RED wire in the USB cable. That's a USB spec. Either it carries current or it does not.
Some devices need to see 2 USB pins to be jumpered in order to set charge on (the Galaxy Tablet is notorious for this which is why you can buy a special cable adapter to create this jumpered charger pin if you are not using their "special" charger. This adapter allows you to to be able to charge the tablet off USB which it normally won't do, faking the tablet to make it think it's on the AC charger, albeit very slow).
Click to expand...
Click to collapse
What I meant is that using the official Verizon car charger, I connected my Galaxy Nexus with the built-in micro USB connector, and my phone showed it to be charging, and the source recognized as "AC". I then tried connecting it using a couple of different cables, using the secondary USB slot on the Verizon charger:
When I used the cable from my wife's LG Env Touch, my Galaxy Nexus didn't show it as charging at all. It apparently wasn't receiving enough to even be recognized as "USB" charging.
When I used the cable that came with my Galaxy Nexus, plugged into the same USB port on the Verizon charger, my phone showed it being charged, but with the source shown as "USB".
So the type of cable will impact whether or not a given adapter will even charge the phone. And the charger itself also has an impact.
To get the phone to charge, and the source recognized as "AC" you are going to need the right charger and cable. As I said, the Verizon charger, using the built-in cable, works fine.
I know that this is a really lame question but I was wondering if one offers a "better" charge? USB charges very slowly compared to the wall charger so I dont want to use it unless I have to.
Also, why does the car charger have a USB hub for the charging cable that comes with the phone if it has a micro USB hub on the end of the cable that is connected to the charger anyways? That is just redundant, is it not?
The wall charger will charge faster... As for 'better'? A charged battery is a charged battery. If you charge it faster than the wall charger allows, there's a potential for overloading the battery (though there should be safeguards to prevent explosive results). But the wall charger is what I'd suggest.
As for the car charger, it's to allow multiple devices. Micro USB for your phone, and a USB port to plug in anything else that might need it (like an iPad or something). If you don't have 2 devices, ignore the USB port and just use the micro USB connection.
takaides said:
The wall charger will charge faster... As for 'better'? A charged battery is a charged battery. If you charge it faster than the wall charger allows, there's a potential for overloading the battery (though there should be safeguards to prevent explosive results). But the wall charger is what I'd suggest.
As for the car charger, it's to allow multiple devices. Micro USB for your phone, and a USB port to plug in anything else that might need it (like an iPad or something). If you don't have 2 devices, ignore the USB port and just use the micro USB connection.
Click to expand...
Click to collapse
Thank you.
Most USB-based charging only goes at 500mA, where as the OEM charger is about 1.5 amps (1500mA). You can find some 2.0A USB car chargers on eBay / Amazon for fairly cheap. They're worth it to get a full charge if you are in a hurry or have a short commute.
Here's one that's 2.1A for $9.99 on Amazon
Cheyse said:
Most USB-based charging only goes at 500mA, where as the OEM charger is about 1.5 amps (1500mA).
Click to expand...
Click to collapse
I've noticed that it chargers obscenely quickly with the little OEM charger. Any idea where to buy more of those (or more similarly powerful chargers?)
wanderfowl said:
I've noticed that it chargers obscenely quickly with the little OEM charger. Any idea where to buy more of those (or more similarly powerful chargers?)
Click to expand...
Click to collapse
Amazon/eBay is your friend. You can find plenty of 2amp USB chargers for like $9 with free shipping.
Cheyse said:
Amazon/eBay is your friend. You can find plenty of 2amp USB chargers for like $9 with free shipping.
Click to expand...
Click to collapse
Silly question, but as long as it's a 5 volt 2 amp MicroUSB charger, it'll work? I just don't want to fry my phone using some incompatible charger.
wanderfowl said:
Silly question, but as long as it's a 5 volt 2 amp MicroUSB charger, it'll work? I just don't want to fry my phone using some incompatible charger.
Click to expand...
Click to collapse
yeah that should work. All Modern day phones have a voltage regulator to stop overcharging.
Warning: iPad Charger
I tried using the iPad charger yesterday and that didn't work out very well. My phone turned off and didn't charge. I couldn't turn it back on, had to do a battery pull to get it going again.
Not sure if this is an isolated incident or not, but I'm going to stick with my Nexus and/or USB charger.
bigknowz said:
I tried using the iPad charger yesterday and that didn't work out very well. My phone turned off and didn't charge. I couldn't turn it back on, had to do a battery pull to get it going again.
Not sure if this is an isolated incident or not, but I'm going to stick with my Nexus and/or USB charger.
Click to expand...
Click to collapse
I used an iPad charger a month ago and the phone only charged 40% over seven hours and when I picked it up it was scorching hot.
Sent from my Galaxy Nexus using xda premium
joshnichols189 said:
I used an iPad charger a month ago and the phone only charged 40% over seven hours and when I picked it up it was scorching hot.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
It makes sense that your phone got hot. When using the stock charger (or any charger with a current rating of 1A or less), the charger is the one that is limiting the current to the battery, so the current-limiting circuit in the phone is not necessarily active and therefore not generating much heat. However, when using the iPad charger (which is rated around 2.5A, I think), the current-limiting circuit in the charger is not active because the 1A or so that the phone is drawing is well within the rating of the charger. Therefore in this case, the current-limiting circuit in the phone needs to actively limit the current and thereby generate a lot of heat.
I personally think that it's better to just use a charger that has a similar current rating to the stock charger. I higher-rated one might charge the battery just fine, but I'd rather keep all of that heat in the charger and away from the battery. Although, of course I could be mistaken -- feel free to correct me if I am wrong.
Anyone else notice that our Nitro is rather fickle about the power source it receives?
If my battery is completely drained, it MUST be plugged into a higher power source than USB (so far a wall charger that ouputs 750ma works) until it gets an initial charge (usually needs at least a couple of %)...Then it will accept charging from USB (USB provides 500ma).
I can tell when it's in this "state" because it remains dead if I plug it into USB and then if I plug it into a wall charger the touch buttons at the bottom flash for a few times and then the LG logo pops up and finally a charging battery icon comes on. Considering this sequence, this seems like a functionality of the phone. I wonder if this is common, my Nexus One certainly didn't have a higher-initial charge rate requirement when the battery was dead.
I've experienceed the same scenario.
Sent from my LG-P930 using XDA
I only have chargers that operate 1.8amps and higher.
As the battery is an issue the higher the amps the faster it will charge
sent from LG OPTIMUS LTE using Tapatalk
Well I did notice that if it was on usb...and I had bluetooth...gps, and wifi...plus running some apps and stuff...the battery actually continued to drain I think they have the usb thing as a safety measure...for some reason...I think it's odd...but meh
try a usb cable that has 2 jacks plugs to connect to tyhe computer. These cables are often supplied with external hard drives as they they require more power than can be supplied by just one usb connection.
I was also having the problem of my p-930 discharging while plugged into compute usb jack - even when screen off nad only in charge mode. I have since bought a dual plugged usb cable and it charges now. Although I haven't tried it from a completely discharged state.
my spectrum is the same way.. i can charge it with usb.. but it takes about 15-20 minutes to get enough charge to turn on
Epyoch said:
Well I did notice that if it was on usb...and I had bluetooth...gps, and wifi...plus running some apps and stuff...the battery actually continued to drain I think they have the usb thing as a safety measure...for some reason...I think it's odd...but meh
Click to expand...
Click to collapse
This! I only charge with a wall adapter now. I had a hard time charging it until someone here recommended this to me.
Hi all:
I just did a test on the maximum charging current of the One X using current measurement equipment, and it shows that the One X does not draw above 460mA of current while charging.
With this value, i suspect that the One X limits max charging current at 500mA, which means 3 things:
1) Using any previous generation USB charger (750mA or 850mA or 1A) is good enough. Attempting to use the iPad's charger (rated at 2A) WILL NOT get you faster charging time.
2) When using battery draining applications, the charging current may not be enough for you to both CHARGE and USE the Phone. Thus it might be a better idea to give your One X some dedicated charging time.
3) Some computer USB ports may specify 500mA of output current, but there are many times the available current is less than that. On my USB port, the charging current is only about 300mA at times. So it is better to use a dedicated charger if you have it available. Having that said, however, it is still ok to charge the One X with a USB port at 300mA, just that charging will take longer.
That's all I have to report. Useful information for all.
limestone said:
Useful information for all.
Click to expand...
Click to collapse
Useful indeed. Thanks
Sent from my HTC Vivid using XDA app
I've had mine charge at 780mAh+ before. 1amp HTC charger. Charge rate slows down at the last 20-30% or so. So from 70%-100% battery, charge rates normally slow to about 450mAh.
limestone said:
Hi all:
1) Using any previous generation USB charger (750mA or 850mA or 1A) is good enough. Attempting to use the iPad's charger (rated at 2A) WILL NOT get you faster charging time.
Useful information for all.
Click to expand...
Click to collapse
thanks a lot, i can confirm the statement above because my stock charger is broken and i'm using the ipad's one.
bye
i tried to use the charger for htc chacha and hd2..
both does not work.. red light will light up but after a while it will go off and the phone does not charge..
Charging my HOX while the phones working hard eventually (after say, 5 mins), causes the charge LED to flash green/red. I've had this twice now, once while playing a 720P HD film, and once when playing Glowball.
Both times the phone was very hot, so i'm not sure if the LED thing was to indicate that the battery was too hot to charge, or that the charger could not supply enough power to charge and power the phone at the same time.
fi3ry_icy said:
i tried to use the charger for htc chacha and hd2..
both does not work.. red light will light up but after a while it will go off and the phone does not charge..
Click to expand...
Click to collapse
I'm using my HD2 charger at work every day. It charges at about 400/500mA.
Original charger gives me 650/750mA (lowers at the end)
chaps said:
Charging my HOX while the phones working hard eventually (after say, 5 mins), causes the charge LED to flash green/red. I've had this twice now, once while playing a 720P HD film, and once when playing Glowball.
Both times the phone was very hot, so i'm not sure if the LED thing was to indicate that the battery was too hot to charge, or that the charger could not supply enough power to charge and power the phone at the same time.
Click to expand...
Click to collapse
If the charger cannot cope with the discharge from the game, a pop up message actually appears. If it's blinking means it's too hot. Try not to do anything intensive the last 20-30% remaining (meaning at 70-100% battery).
Nice info thanks
Sent from my HTC One X using XDA
fi3ry_icy said:
i tried to use the charger for htc chacha and hd2..
both does not work.. red light will light up but after a while it will go off and the phone does not charge..
Click to expand...
Click to collapse
Same here... I am using the Atrix 4G (US) charger, it does not charge the phone. The charger gives output of 850mA. It does charge when plugged into the laptop, but I think it will take very long that way.
*edit for posterity*
after a while (I did it when battery had charged to 20%), I could connect the Moto US charger, and it would show as "AC". It would not want to charge through it when the battery was really low (2%), but it would charge via USB in that case. Weird behavior, IMO.
USB limited to 500. AC limited to 1A.
Sent from my HTC One X using xda premium
If you want maximum speed of charging (AC charging) you need:
1A charger with shorted D+ and D- pins (eg, original HTC charger).
iPad charger probably doesn't have these pins shorted, so in this case phone will see it as USB charging (you can check it in settings->battery) and will limit charging current to 500mA. Also lot of aftermarket car chargers will work only in USB mode despite they are able to supply 1A.
Here you can find some info on USB Charging Ports (shorted D+- pins):
http://en.wikipedia.org/wiki/Universal_Serial_Bus#Charging_ports_and_accessory_charging_adapters
When charger is "USB", it will not draw more than 500mA from the charger, and usually it will not charge at all (because the current draw with screen on is higher than 500mA).
When charger is AC, it seems to draw 1000mA - but this is still too low to charge while phone is doing anything, as it will draw 700mA and charge ~250mA top.
I hope this can be tuned in kernel, because it sucks, I also hope that power source can be AC (and not battery - look in dmesg when charger is connected), because battery gets too hot when under load...
colin_ktp said:
If you want maximum speed of charging (AC charging) you need:
1A charger with shorted D+ and D- pins (eg, original HTC charger).
iPad charger probably doesn't have these pins shorted, so in this case phone will see it as USB charging (you can check it in settings->battery) and will limit charging current to 500mA. Also lot of aftermarket car chargers will work only in USB mode despite they are able to supply 1A.
Here you can find some info on USB Charging Ports (shorted D+- pins):
http://en.wikipedia.org/wiki/Universal_Serial_Bus#Charging_ports_and_accessory_charging_adapters
Click to expand...
Click to collapse
Can you post a potential list of car charger which are working at 1mA according to you?
I've only tested few devices:
Extrememac external battery for iPhone/iPad (max 2A) had pins not shorted - USB charging mode on One X (500mA).
Some cheap car adapters - max 1A (according to spec) - USB charging mode on One X.
To fox this problem you should prepare a USB extension cable or micro-usb cable with shorted D+ and D- pins and it should be recognized as AC adapter. I think that also some old HTC phone chargers might come with shorted pins in cable already, but don't know which...
What about the official HTC car charger?
MickyMax said:
What about the official HTC car charger?
Click to expand...
Click to collapse
Yes, that one will charge at the full rate.
There is no list of known good chargers - it's down to luck or a recommendation from someone who found one. You can be sure that any charger advertised as "iPhone, iPad or iPod" compatible will NOT charge your One X at the full rate.
I found one recently in a local petrol station shop. It was £5. I took it apart to have a look and the D+ and D- pins are correctly connected together (via a low value resistor) so it charges at the full rate.
So, I might suggest you look for the cheapest Chinese car charger you can.
USB charging not OK inside a car
zvieratko said:
When charger is "USB", it will not draw more than 500mA from the charger, and usually it will not charge at all (because the current draw with screen on is higher than 500mA).
When charger is AC, it seems to draw 1000mA - but this is still too low to charge while phone is doing anything, as it will draw 700mA and charge ~250mA top.
I hope this can be tuned in kernel, because it sucks, I also hope that power source can be AC (and not battery - look in dmesg when charger is connected), because battery gets too hot when under load...
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Bingo. I also noticed that when I have the screen on at 100% brightness, GPS and Bluetooth on, i.e. in the car, the USB charger cannot even keep up with the battery drain.
On top of that, the battery gets really hot.
I did not have any of these issues with my SGS2, and frankly, I think it's very disappointing. One should at least be able to stay on the same battery level while doing nothing too fancy and on USB inside a car.
A380 said:
Bingo. I also noticed that when I have the screen on at 100% brightness, GPS and Bluetooth on, i.e. in the car, the USB charger cannot even keep up with the battery drain.
On top of that, the battery gets really hot.
I did not have any of these issues with my SGS2, and frankly, I think it's very disappointing. One should at least be able to stay on the same battery level while doing nothing too fancy and on USB inside a car.
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There are a lot of factors in the charging current. When you charge, the battery will heat up during the process, especially towards the end of the charging cycle. If you are using your phone at the same time and cause even more heat and charging may slow down to prevent overheating. Also, as mentioned prior, charging slows down as capacity is reached. 100% brightness, GPS, and Bluetooth all on has always walked the fine line of just barely keeping up on my past phones on a 500 mA USB charger. On top of that, this phone is a lot more powerful than an SGS2 and the T3 and big screen produce more heat which may be slowing your charging more.
The problem is a lot of cheap chargers that the phone thinks are USB chargers, not AC chargers, thus causing them to only charge at 500 mA. If you have a proper charger, or a properly modified charger, you should get more like 1A, assuming conditions are right.
In the past I've used Battery Monitor Widget from the Play store to show my charging current on a widget, as well as track and graph battery use, charging current, temperature, etc. Might want to give it a try if you're more interested in charging details.
Im using my htc desire charger and cable (the one that splits in two). It works fine for me but it does take a while to get a full charge. Should i use the charger and cable that came with the phone?