I am using my razr maxx for usb tethering. This draws more power than the 500ma usb limit. I know that a fast charge kernel will allow the phone to draw more than 500ma and that this works well with a usb Y cable. Typically the fast charge hack will disable the usb portion of the connection. I have seen at least one other device has a kernel tweak that will allow fast charging and still use the data. Is there such a kernel for the RAZR?
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Is there a program/driver that will allow the leo to pull more than 500mA when connected via usb? My TP2 (CDMA) has this installed and its bad ass. I can charge faster off things like a cable box (or my computer) than the wall. It pulls ~928mA.
Right now I have a Y adapter.. I plug the power only usb into the computer and the data into an external source (like a duracell powersource mobile). tBattery reads "AC" for charger input. Then, I unplug from the powersource and plug the data part of the usb Y into the computer, hopefully forcing it to switch to usb mode while retaining high current draw. No dice, its still on AC.. and the data cable is not communicating with the computer/phone. If i were to unplug the power only cable, it would probably switch right over to usb mode and WMDC would pop up and all that. But.. I would be limited to 500mA, which is.. really weak since the phone can only use about 150 of that for charging!
Charge with your phone off may help?
That is not possible, because PC can't give more than 500mA on one USB port.
Check in Windows device manager (PC) and find Generic USB Hub. Then look on "Power" tab.
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You can't. You could burn USB port in your computer.
Mike
This is a screenshot taken from my touch pro 2.. Plugged into the usb port of my laptop. This is possible. It also is possible with my cable box. It requires a driver/app from nuerom..
http://www.nuerom.com/BlogEngine/po...g-nueBattery2-For-TP2-CDMA-v12-Build-122.aspx
btw.. ports are either in high power or low power.. 500mA should really say 500mA+... Some ports are NOT capable of doing this.. I'd imagine I could trigger the same by connecting devices to all three of my usb ports on my laptop.
many gigabyte mainboards have the function to deliver 3x more power through usb ports. ive tested myself and can only confirm it is charging within 1.5~ 2 hours completely
Yeah - maybe, but if... higher charging amperage causing battery/phone overheating and dramaticly shorting battery life. I know, that dedicated HTC HD2 charger having 5V and 1A (1000 mA), but this is TRAVEL charger and should be used only in this situation by reasons previously wroted by me. I charge my LEO only with PC.
i think it depends on the charger itself. i bought a docking station and while reading the manual i came across a switch that changes the mode between "charge" and "sync"
this lets your device acknowledge that the charger is capable of providing more mA than a normal USB port so that it can draw more power.
The ac charger (or the battery driver itself) is smart enough to trickle down the charge rate as the battery reaches maximum capacity. We have an aluminum battery cover that seems to have a heat pad to transfer that heat from the battery. The battery driver probably has provisions to stop charging if batt temp reaches a certain #.
500mA charge is not enough. The phone itself is able to draw more current than a 500mA line could provide.
I just plugged a y adapter into my laptop. Plugging only the power portion in. tBattery says USB for charger input.. Taking the data/power 'part' of the Y adapter cable and plugging it into a usb power source (with no data pins, like a duracell powersource mobile) puts the phone into ac charger input. I disconnect the duracell charger and leave only the phone plugged into my y adapter to my computer... still says AC charging.
I'm now able to charge the phone using 1 computer usb port. World doesn't end. Phone doesn't explode.
Pictures are worth a thousand convoluted paragraphs.
when i tether to my pc via pdanet, my phone's battery gradually drains(which i'm sure you guys experience also).
has anyone tried out this cable(or one like it)? does it prevent battery drain?
voxigenboy said:
when i tether to my pc via pdanet, my phone's battery gradually drains(which i'm sure you guys experience also).
has anyone tried out this cable(or one like it)? does it prevent battery drain?
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Yeah, but not as much as a normal charger. The thing is that when connected to PC, to my knowledge, the kernel limits the charge rate even more than the current limit that you get from the the normal charger.
Kernel limits current from wall to say 850mA, even if have a 2000mA charger.
Kernel limits current when connected to the PC to say 500mA, even if you have a Y cable with the power-only leg on a 2000mA charger.
Most USB ports can't even give more than 250mA, even though the USB spec states 5V, 500mA.
A Y cable would help you because it would let you get at or close to the kernel limited 500mA.
Sent from my SCH-I510 using Tapatalk 2
Yes the split cable helps a lot on computers with standard USB ports with 500mA power supply. My other computers have 1.5A USB ports, and those are able to charge just fine with the standard straight USB cable.
Coming from the Galaxy Nexus where I had Fast Charge via USB allowing me to pull 1A from the USB port vs the .5A. My Note2 is rooted, does anyone know how to enable this or do we need to wait for a cutom kernel? Thanks!
If you look at the included wall charger, it's rated at 2 Amps. So it may not need the fast charge option.
I think he's referring when hooking the USB to a computer. That is always a slower charge.
You need a custom kernel that supports it.
FAUguy said:
If you look at the included wall charger, it's rated at 2 Amps. So it may not need the fast charge option.
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The Fast Charge enables the phone to pull more power out of a standard usb port connected a computer not a wall charger.
and forget what I just said because i never refreshed the page to see someone already said that. Thanks!
OK, then you'd have to wait for a custom kernel that would have the feature in it.
I use it on the GS3 with its wall charger. It cuts the charge time in half.
But I've never tried it with charging from a PC's USB 0.5A port.
I researched before posting this. I'm a Nexus 4 user fixing my fiancé's sgs3. The phone started charging at 100mA a few days ago. So I flashed temasek and boeffla to ignore the detection problem. Now, however, the phone detects the AC charger as USB. I've tried a different battery and 2 other chargers.
Also, to get around this, I used boeffla's kernel settings app to increase the Amps when charging from usb to 1000mA and the charging current increased on the Galaxy Charging lite.
However, if i use the phone while charging, the battery percentage drops. I need a way to fix the USB/AC detection problem. I can't keep the 1000mA rate on USB.
Any help?
Really? Nobody??
Try checking "ignore unstable charging power" and "disable charger margin detection ".
Set the USB current to 1000mA instead 475mA by default.
All that is done in Boeffla config.
If still the same, try with other USB cable.
If it keeps failing, I'd say the USB connector is damaged, common on these phones (and all other phones using microUSB)
Thanks for the reply. I've already tried all of that. It seems that when I plug the phone into the AC charger, sometimes the cable is detected as USB and it charges at 500mA (though set to 1000) and sometimes as AC. So what could the problem be here?
This forum is much more helpful than what I expected
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Vs985 on CM12. When I plug my phone with the LG's native USB into my Honda - it does not seem to charge. It only changes to show a battery indicator amount of charge. Even with charge only selected in the usb settings. If I plug my phone into my laptop it shows a lightning bolt in the battery icon and seems to charge? Is there some kind of a device I can plug into the usb or something I can do on the phone to enable usb charging?
If it were me, I'd try it on a stock LG ROM to determine where the problem lies.
abexman said:
Vs985 on CM12. When I plug my phone with the LG's native USB into my Honda - it does not seem to charge. It only changes to show a battery indicator amount of charge. Even with charge only selected in the usb settings. If I plug my phone into my laptop it shows a lightning bolt in the battery icon and seems to charge? Is there some kind of a device I can plug into the usb or something I can do on the phone to enable usb charging?
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I sell Honda's and the usb port only works with Apple products,plug in an iPod or iPhone and it will charge it
Sent from my VS985 4G using XDA Free mobile app
abexman said:
Vs985 on CM12. When I plug my phone with the LG's native USB into my Honda - it does not seem to charge. It only changes to show a battery indicator amount of charge. Even with charge only selected in the usb settings. If I plug my phone into my laptop it shows a lightning bolt in the battery icon and seems to charge? Is there some kind of a device I can plug into the usb or something I can do on the phone to enable usb charging?
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When plugged into your laptop, or desktop for that matter, your phone WILL NOT charge at the same speed as it would when plugged into a wall charger for the express reason that the outlet will provide a higher voltage, one capable of charging the phone, while the laptop doesn't provide as large a voltage through it's USB port because many USB operated devices for a computer require a much lower voltage to operate properly. As for the Honda charging, I believe it would be the same deal, but I'm not an expert on vehicles so I'm not positive.
6NomoN6 said:
When plugged into your laptop, or desktop for that matter, your phone WILL NOT charge at the same speed as it would when plugged into a wall charger for the express reason that the outlet will provide a higher voltage, one capable of charging the phone, while the laptop doesn't provide as large a voltage through it's USB port because many USB operated devices for a computer require a much lower voltage to operate properly. As for the Honda charging, I believe it would be the same deal, but I'm not an expert on vehicles so I'm not positive.
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I hope you don't taste this the wrong way, but to some like me, it's a pet peace. ? The voltage is the same,the amperage is different.
I believe computer USB 2.0 and 1.x ports are normally limited to 500mA (half an amp). Some PC's USB drivers even let you monitor how much amperage each USB port is drawing when it's bring used.
USB 3.0 might be higher. I'd have to read again to be sure, but the additional amperage USB 3.0 might supply shouldn't require a USB 3.0 cable to take advantage of it.
Some implementations of USB in some PCs supply higher, and presumably some lower amperages than the known standard.
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