My Defy is extremely picky when it comes to charging.
I tried a few different power adapters. All run at the standard 5V used by all USB ports. The only variable is the current.
The power adapter shipped with my Defy spits out 850 mA and apparently my phone doesn't like to eat any other current. With a 500 mA adapter my Defy won't charge at all. That's strange, because it charges fine when connected to my computer, and those USB ports max at 500. At 1000 mA my Defy charges OK, but the screen becomes hypersensitive. Just moving my fingers within 10 cm from the screen is enough to scroll, make icons believe they're tapped, and make the phone do all kinds of random stuff. Spooky!
My other phones all charge fine at 500 mA, 800 mA (default Nokia charger current), 850 mA, and 1000 mA. They don't seem to care about the current at all. Same for my camera with a microUSB port. Any current from 500 to 1000 mA works. Only my Motorola Defy is playing difficult and insists on 850, not more and not less.
Does this mean that there's something wrong with my Defy or is this deliberate sabotage by Motorola to stop us from using competing power adapters?
Mine charges off the Motorola one, a Sony Ericsson one, a ZTE one, a cheapo Tesco one and off the PC USB ports. The output of the charger will only effect the charge time.
Right now charging mine off my Kindle a/c charger. Seems to work.
Of course the Kindle adapter works. Its output current is 850 mA, just like Motorola's own adapter.
Did anyone ever try to charge a Defy with a 500 mA or 1000 mA adapter?
It wont work with chagers which are being made for other phones
http://forum.xda-developers.com/showpost.php?p=13871623&postcount=49
800mA current
Even an 800 mA charger won't work? That sucks. Why did the phone manufacturers agree on microUSB as charger port standard?
Fortunately my cheapo 1000 mA adapter works, as long as I keep the display switched off during charging.
Hey my Old Samsung phone's charger 0.55A(4.75V) works best! charges faster than moto's charger! Bdw switching chargers isn't good for Batt life i read this sumwhere....
use moto charger!
It's the max output the charger can sustain. Just like the specification on electrical socket, fuse, cable etc. So it doesn't matter as long as it is not exceeded.
It works with SonyEricsson charger but not the one for HTCLegend
I have not experienced any problems with charging from a variety of adaptors. However I do have a couple of the portable li-on battery backs, they seem to have enough juice to recharge/power PSP and DSLite, but can't supply enough current to charge Defy or my San Francisco.
Does anyone know of any reasonably priced portable power packs that can do the job?
On my defy I've used my gf's HTC Desire charger (1A), and it was all good, no hypersensitivity. But I remember I bought a cheap no-name charger for my itouch and when I was charging it, there were similar issues you said.
i'm using my nokia E66 data cable in lieu of my motorola cable to charge my phone. no issues
rogier666 said:
My Defy is extremely picky when it comes to charging.
I tried a few different power adapters. All run at the standard 5V used by all USB ports. The only variable is the current.
The power adapter shipped with my Defy spits out 850 mA and apparently my phone doesn't like to eat any other current. With a 500 mA adapter my Defy won't charge at all. That's strange, because it charges fine when connected to my computer, and those USB ports max at 500. At 1000 mA my Defy charges OK, but the screen becomes hypersensitive. Just moving my fingers within 10 cm from the screen is enough to scroll, make icons believe they're tapped, and make the phone do all kinds of random stuff. Spooky!
My other phones all charge fine at 500 mA, 800 mA (default Nokia charger current), 850 mA, and 1000 mA. They don't seem to care about the current at all. Same for my camera with a microUSB port. Any current from 500 to 1000 mA works. Only my Motorola Defy is playing difficult and insists on 850, not more and not less.
Does this mean that there's something wrong with my Defy or is this deliberate sabotage by Motorola to stop us from using competing power adapters?
Click to expand...
Click to collapse
I have a similar problem as you.
I think the Defy only charges with 500 mA to maybe 1000 mA. I can charge my Defy with any PC and Tablet USB ports, a Nokia AC charger and a couple of car USBs with 1A output. However, it won't charge with 2 other car USBs with 2A output. I measured the voltage of these two and they are good, at around 5.2 to 5.3V.
I was hoping to find a higher capacity car charger because I am using my Defy as car camcorder, and 1A simply cannot supply the current needed!
My defy can be charged with an htc 1A charger as well as a 500mA samsung charger. But it refuse to charge from no name cheapos.
Sent from my MB525 using Tapatalk
Tried a new adapter, made by Sony Ericsson. 5.0V, 850mA, exactly the same output as Motorola's own power adapter. But the SE adapter has the same problem as the no name adapters I tried: they charge my phone, but I need to keep the screen locked 'cos the adapter makes it hypersensitive.
So it must be my phone. For some strange reason it doesn't like it when I use any other adapter than the one that came with the phone.
I wonder if its refusal to work with non-Motorola adapters is a reason to get my Defy fixed under warranty...
The problem you guys are facing is not related to the current, but to the pins used by the cable in the USB interface.
The defy will only charge if it is connected with a full USB connection.
Not all the USB cables come with all the pins, I for example have one for my Bluetooth headphones that only has power and it does not charge my defy but it does charge my hd2.
Gesendet von meinem CM7 Defy
The problem persists when I use the Motorola cable with a non-Motorola adapter.
When I use the Motorola charger adapter together with non-Motorola USB cables my phone charges OK.
So the problem has nothing to do with cables and pins.
rogier666 said:
The problem persists when I use the Motorola cable with a non-Motorola adapter.
When I use the Motorola charger adapter together with non-Motorola USB cables my phone charges OK.
So the problem has nothing to do with cables and pins.
Click to expand...
Click to collapse
It has to do with cables and pins.
If your cable has all the pins (normal data USB cable) but your adapter doesnt have them connected is the same thing as having a USB cable with only power pins.
Check out cables diagrams to see how them work.
There is even a hack for some HTC phones, where you actually short some pins on the cable so the phone think it is connected to a wall charger and not a USB port, allowing the phone to use more than the 500 mah the USB can provide (useful for car adapters).
This is fact, I'm not pulling it out of anywhere hehe
I charge both my Defy and the HD2 with the same HTC charger, and I have a extra USB portable battery, which charges the HTC but it doesnt charge the Defy, both are running CM7.... the issue? the danged chinese battery only has power pins and the phone refuses to charge from it @[email protected] it does charge my Bluetooth Headphones and the Camera
My non-Moto 1000 mA and 850 mA adapters make my screen go wild, but they charge my Motorola Defy.
If it was a cable/pin issue they wouldn't charge my phone at all.
If I plug my knockoff 500 mA adapter in my Nokia USB port (which is for data only, not for charging) my old Nokia pops up a "USB data connection detected" message.
Not all charger issues are due to cables and pins. Sometimes its the output voltage and current that messes things up.
rogier666 said:
My non-Moto 1000 mA and 850 mA adapters make my screen go wild, but they charge my Motorola Defy.
If it was a cable/pin issue they wouldn't charge my phone at all.
If I plug my knockoff 500 mA adapter in my Nokia USB port (which is for data only, not for charging) my old Nokia pops up a "USB data connection detected" message.
Not all charger issues are due to cables and pins. Sometimes its the output voltage and current that messes things up.
Click to expand...
Click to collapse
I know not all issues are related to the cable and pins, but this specific issue with the Defy not charging is.
Both your chargers comply correctly with USB charging standards then.
Notice this also happens on the Droid, and shorting both Data pins allows the phone to charge. And can be read on the forums that it works too with the iPad
Anyways, here is what happens to the defy:
http://en.wikipedia.org/wiki/Universal_Serial_Bus
"There are also devices at the host end that do not support negotiation, such as battery packs that can power USB-powered devices; some provide power [...]. USB power adapters convert utility power [...] to run attached devices. Some of these devices can supply up to 1 A of current. Without negotiation, the powered USB device is unable to inquire if it is allowed to draw 100 mA, 500 mA, or 1 A."
There you go, no Data pins = Defy do not draw power, not charging.
I would like know if it charges shorting Data pins tho.
All that is required is short both Data pins with each other, doesnt matter if its on the cable or the charger.
Related
So I visited my local Walmart and discovered a car charger, designed for Blackberry 6200 through 7500 and Motorola RAZR series phones.
The connector is the same, mini USB B.
$25,000 Question: Can I use this to charge my TMO MDA? Same connection, just worried the voltage or wiring might not be the same.
The AC chargers that came with my Razr and MDA are the same voltage-wise (5V) but not the same Amps.
MDA is 5V 1A, Razr is 5V 0.5A, they are not the same
However, it shouldn't damage the battery, just charge slower.
Just so you know, USB ports output 5V at 0.5A as well.
Edit: Sorry, I realize I completely changed my post, but didn't want incorrect info out there.
Thanks...I figured that, but was just making sure.
I got it in case of emergency...I almost always charge via USB; just leave it plugged in all day.
But you never know.....
Thanks!
fuzzie said:
Thanks...I figured that, but was just making sure.
I got it in case of emergency...I almost always charge via USB; just leave it plugged in all day.
But you never know.....
Thanks!
Click to expand...
Click to collapse
Don't expect it to charge if you battery is below 30-20% charge. I'm not sure why this is an issue but it has bitten me in the rear once already.
Does anybody know why it's a problem for "less-than-1amp" chargers to charge back from the low threshold?
boxwave.com sells a 1 amp car charger. It has a USB port, so you just use it with any cable that normally plugs into a USB port. Since my Globalsat GBH-820 BT adapter came with a cable with large USB at one end, and _two_ mini USB at the other end, I can charge the GBH-820 and my 8125 at the same time.
oconnor.jb said:
boxwave.com sells a 1 amp car charger. It has a USB port, so you just use it with any cable that normally plugs into a USB port. Since my Globalsat GBH-820 BT adapter came with a cable with large USB at one end, and _two_ mini USB at the other end, I can charge the GBH-820 and my 8125 at the same time.
Click to expand...
Click to collapse
That's not true,... if you use the VersaCharger like I do. This is where I learned of the "charging only" cable that Boxwave sells (how conveinent) and then they sell a Sync/charger for USB only. I have a Boxwave VersaCharger that I can't use without buying their "cable" to make it charge the 8125. I found this out because I have a Belkin retractable sync/charge cable that doesn't work with the VersaCharger as I had hoped. The cable that you have may work with 1amp charger but it probably won't work with theVersaCharger.
What is the output on the "min-usb" connector end of the cable? This sounds like the cable that I need for the 2 devices that I use.
...I wonder if they are putting some electronics in the cable connector...?
I bought the bundle that had a car charger (I have the regular; not the high output; not the Versa) and two mini-Sync (retractable) cables. I got caught by the fact that one of them is "charging only" when I was trying to use the "charging only" cable between my laptop and my TI-84plus calculator. I switched to the mini-USB cable that came with my calculator, and it worked fine, as did my phone with AS. That's when I looked closer at the two mini-sync cables and noticed that one was for "charging only". So, that mini-sync cable (the charging only) stays in the car, and works fine for charging my phone or my GBH-820. The really odd thing is that the "charging only" cable looks "thicker" than the one that works for syncing. Maybe lower gauge wire to help the higher current flow easier.
I have also used my other USB-miniUSB cables with my car adapter. E.g. the cable that came with the phone, the cable that came with my TI-84plus calculator.
My Bluetake headphones came with their own USB cable that has, for lack of any better term, an ultraminiUSB (or some kind of proprietary connector, cause it's not marked with a USB symbol like the other cables) plug at the end. I just plug the regular USB end of that cable into the car charger, and it charges the Bluetake's just fine.
Excellent car charger for Wizard
I have purchased and used the "Ecovell 4x USB" adapter on both a Wizard and a Universal. It provides a 2 Amp output which is equivalent to the AC adapter and works with any mini-USB cable. It will charge a Universal from absolutely dead which I have not been able to do with any other adapter. Here is the link to the item on Yes Depot:
http://www.yesdepot.com/product/ud0520.html
I've ordered from them and the service was OK. I haven't seen the item available anywhere else.
Regards,
Dave
HI Friends
Do you hv any software to carry out fast USB Charging option, to charge my XDA with same speed as done by AC Adapter...
I have seen that other WM2003 models has this option.... like in HP 6515..
Thanks
Manmohan
Interesting... I've got a desktop holder which has to modes: charge-only and normal sync/charge mode. I wonder wether charge-only mode "enables" fast charging or wether the AC adapter does something special...
If i'm not mistaken, the typical USB port outputs 5V of power at 500mAh (milliamp-hours). And in my case, my shipped charger outputs 5V at 1000mAh . using the supplied charger would charge my Magician twice as fast compared to the USB (explanation below). I think even USB2.0 ports still give out power at 500mAh.
The Magician's battery is rated at 1200mAh. Charging through the PC's USB port would take roughly 2.4 hours. Using the supplied charger, it would take 1.2 hours. Simple equation for charging is, battery rating (mAh) divided by charger rating [so that's 1200mAh/500mAh for USB]. Disregard the voltage for now unless you plan to make your own standard/portable charger. Rule of thumb, refrain charging the battery with a higher mAh rated charger.. It will damage the battery in the long run.
Hope this helps. Cheers!
Although if you could somehow control charging via software that'd be a nifty tool...
i doubt it since max current USB can provide is 500mah as any more would damage the port and probably the board.
Hello
Yup, jedhonx your right! Its the amount of power supplied! There is no way that you could use a software to charge the device in USB at faster rates.
The only way it could be thought of is like, if your device processor is running at certain spped, it consumes some power. When it runs at lower speed, it consumes lesser power and so if the software could make your processor run low or to shut down other programs maybe would show you an incresed speed of charging!
Regards
Carty..
what about taking two usb ports with such a hard disk cable?
snudel said:
what about taking two usb ports with such a hard disk cable?
Click to expand...
Click to collapse
One of the following three thing WILL happen if ALL of them...
1-Fried Motherboard
2-Fried Battery
3-Fried Device
The first can happen because the USB ports will send energy to each other, the other two because voltage WILL duplicate... Think like this, when you have a device that uses "normal" batteries like a remote or a portable cd-player that uses two or more 1.5V batteries they use it because the device works with 3V (2*1.5V batteries)... Hope I made myself clear, because my english is quite rusty...
c3l5o said:
The first can happen because the USB ports will send energy to each other, the other two because voltage WILL duplicate... Think like this, when you have a device that uses "normal" batteries like a remote or a portable cd-player that uses two or more 1.5V batteries they use it because the device works with 3V (2*1.5V batteries)... Hope I made myself clear, because my english is quite rusty...
Click to expand...
Click to collapse
Well if you link USB ports to increase voltage it's true that it'll probably kill the mb. But linking 2 UBS connectors to increase amps is no problem and often done. You end up getting 5V 1A output. You could even link more ports to further increase the maximum supplied amps, alltough I never tested more than 3.
Linking 2 ports in a way that increases amps will NOT fry the mb, will NOT fry the battery and will NOT fry the device.
I'd say give it a try and see if it charges quicker.
Actually I think it depends on how many separate USB chips are connected to the USB ports. On one chip (or better say channel) can be more than one port be connected on the computer (like with a passive hub). In that case, connecting two USB cables in parallel doesn't change anything. Otherwise you could connect the cables in parallel and simply get more current at the same voltage (not to mix up with setting batteries in serial).
There are USB chips on the market that supply more than the specified 500mAh, but I suppose the Magician itself detects a USB connection to the computer. I remember that the first ROMs could only be loaded by USB chargers when Pin5 was connected to Ground, which was never necessary when a real USB connection was established to the computer. USB connections to the computer only use 4 Pins. This tells me that the Magician distinguishes between a connection to the charger and a connection via PC USB and limits the power drain correspondingly. If that is the case, connecting a cable with two USB ports doesn't help, it's still recognized as PC USB connection by the Magician.
it maybe OOT, but still relates. my magician can only be charged by usb cables. wont work on ac adapter. it has been going for few months and it really bugging me since it takes 4 hours to charge through usb cables.
i did try hard reset and no change .
HI Friends
I appreciate that you are trying all your mind to find the solution..
I believe that O2 provied AC Adapter wont pass additional current to screw up the battery life as it is provided by O2 Manufacturer itself. If Adapter takes 2 Hrs to completely charge the O2 Mini, then this can be done by USB cable also.
Also if you see in any other PDA running windows mobile 5 you will see an option of "fast USB Charging"..
It means that it can be done, but we need to find out how it can be done.
Thanks
Does anybody know what the power output specification for car charging is for the Tilt? The wall charger puts out 5v and 1mA, but I haven't figured out what car charger is necessary. Internet sites all list different outputs including the 5v and 550mA which is the same for the Razr.
I don't want to use one that will damage the phone. Will the 550mA work but just not as fast, or can it damage the phone?
I have been trying to read other posts on this subject, but none are conclusive.
I just bought a car mount but it came with the 550mA charger and they are giving me a hard time about it.
I also notice that the usb port which charges the phone only puts out a maximum of 500mA. I just don't know much about electrical stuff and I am hoping to get some insight from you all.
All I know is that I am using Moto chargers for my phone and they're working.
I use Moto chargers and they work fine, just not as fast.
Thanks guys.
Is there any way to see if the unit is being fast or slow charged? It seems that the HTC charger uses an extra pin on the charger to enable fast charging and that MAY be why some aftermarket chargers (wall and car) do not seem to keep up with the battery discharge when running even if their plugged into a charger with sufficiant current capability. The HTC Wall caheger is rated as a 1 Amp charger. I have other chargers that use an external USB cable to connect, both rated as 1.5Amp (1500mA) chargers but seem to charge very slow. Soooooo I'm looking for the difference between the HTC charger and the aftemarket ones to see if I can make the ones I have work properly.
Thanks for any help
joe
<edit> in Looking at the Mini USB spec I find 5 pins labeled 1-2-3-x-4 with 1being VCC (5v), 2 & 3 being Data + & - and 4 being Gnd. Does the Advantage use the X pin to enable fast charging? How? Does it provide a second 5v line to cause/enable the Advantage to fastcharge? I think I need to look at the wall charger mini USB pinouts.
After talking to Pocket PC Techs and looking around online, it looks like the x-pin (next to pin 4(gnd)) is shorted to pin 4 to provide the advantage with a sense line to tell it to fast charge. The also shuts off the data lines in the unit AFAICT. Still don't know what the current capability of "Fast Charge" is or how to ask the unit to query the port for status. USB ports are generaly limited to 500ma and the stock charger is 1000ma (1A) so it seems that to ensure the MAX charge, the cable connected needs to have the x pin and pin 4 shorted. This is usefull if you are NOT wanting to do a data transfer (car GPS, stand alone charging, etc).
Here is a link to the connector http://pinouts.ru/PDA/pda_miniusb_pinout.shtml
Anyone can add to this?
Joe
I just received the Lil Sync DUO Mini-5 Adapter from PPC tech and it works perfectly. I'm now getting a fast charge from my PC (no sync) and I'm able to charge my S705 bluetooth headset.
Interesting news on the pinouts. I've never heard of any utility that shows fast vs. slow charge.
I wonder if anyone has a utility that can sense a gnd on the x pin (next to gnd) of the input connector. Does anyone have a schematic of the advantage side of the input power/data connector. It would me that there might be a pullup on that line sothe unit see's it as a high untill pulled low by a ground applied tothe x pin.
here you have "hot to do it"
http://forum.xda-developers.com/showthread.php?t=396053
ppa25 said:
I just received the Lil Sync DUO Mini-5 Adapter from PPC tech and it works perfectly. I'm now getting a fast charge from my PC (no sync) and I'm able to charge my S705 bluetooth headset.
Click to expand...
Click to collapse
Please tell me i need "PPC Techs HTC Advantage Lil Sync Extended Cable + mini 5 DUO" ( http://www.expansys.com.gr/p.aspx?i=145972) or ONLY "PPC Techs HTC Advantage Lil Sync DUO Mini-5 USB Adapter" (http://www.expansys.com.gr/p.aspx?i=145975) ?
Does anyone have a confirmed working car charger for this phone?
My motorola car charger that I used for my GNex and GS3 isn't fully compatible with the G2. I get a message saying "slow charging" when I plug it in.
What do you guys use to achieve full charging speeds?
I realize there's a Q&A forum, but since this is directly related to accessories, I wasn't sure if it was better suited for this forum.
Nobody has a working car charger?
Both of these work for me.
http://www.amazon.com/gp/product/B0042B9U8Q/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1
http://www.amazon.com/gp/product/B006SU0SX0/ref=oh_details_o03_s00_i01?ie=UTF8&psc=1
the powerjolt is much more low profile though
That's just a generic list. The G2 requires a hi power charger
jeff_warner said:
Hi check out this collection of car charger for LG G2...they all are compatible with LG G2 and wont create any issue of slow charging and all...you can avail any of them for free shipping too...
Thanks !!!!
Click to expand...
Click to collapse
Sent from Bad Azz VZW LG G2 Cyan Tapatalk
beddachedda said:
Both of these work for me.
http://www.amazon.com/gp/product/B0042B9U8Q/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1
http://www.amazon.com/gp/product/B006SU0SX0/ref=oh_details_o03_s00_i01?ie=UTF8&psc=1
the powerjolt is much more low profile though
Click to expand...
Click to collapse
The powergen dual port works great. It has two 2.1amp USB ports, one that works with Android, and the other with Apple products (when using a data cable --> detecting USB vs AC charge mode). I have custom USB cables where I shorted the data pins so I always pull at AC charge rates regardless of the port type. In any event, this charger should provide you with the same capability as the OEM wall charger.
I have a 2amp car charger and it works fine, no message about slow charging.
the issue im runnin into is find a usb cable that enables fast charging
i have a dual usb car charger that put out 2amps per usb but cant.find an aftermarket usb to micro that can support more amps (fast chargin)
the oem lg g2 cable works...as well as the nexus 7 cable
i got this cable but doesnt charge more than 1amp
http://www.amazon.com/gp/aw/d/B004G...c=1&redirect=true&ref_=oh_details_o01_s00_i02
---------- Post added at 10:01 AM ---------- Previous post was at 09:54 AM ----------
kyler13 said:
The powergen dual port works great. It has two 2.1amp USB ports, one that works with Android, and the other with Apple products (when using a data cable --> detecting USB vs AC charge mode). I have custom USB cables where I shorted the data pins so I always pull at AC charge rates regardless of the port type. In any event, this charger should provide you with the same capability as the OEM wall charger.
Click to expand...
Click to collapse
how do u short the data pins?
nitric13 said:
the issue im runnin into is find a usb cable that enables fast charging
i have a dual usb car charger that put out 2amps per usb but cant.find an aftermarket usb to micro that can support more amps (fast chargin)
the oem lg g2 cable works...as well as the nexus 7 cable
i got this cable but doesnt charge more than 1amp
http://www.amazon.com/gp/aw/d/B004G...c=1&redirect=true&ref_=oh_details_o01_s00_i02
---------- Post added at 10:01 AM ---------- Previous post was at 09:54 AM ----------
how do u short the data pins?
Click to expand...
Click to collapse
To short the data pins, I actually cut a USB cable, stripped back the insulator, re-soldered the +5V and ground wires, soldered together the data pins on the microUSB side of the cable, and stagger cut the data wires on the other side. Prior to the re-soldering, I slipped some shrink tubing on one end of the cable to re-insulate everything. Not for the faint of heart.
Background for those that don't know... Typically, Android phones look for little to no resistance on the data pins to detect a high current charger. Any other load triggers USB mode since most PC's are only designed to supply 500mA via USB. I assume this is a safety issue to prevent overdrawing a PC's port. Apple operates differently. They look for some nominal resistance as USB and switch to fast charge under open or some higher resistance. Most chargers >500mA are designed for the iPhone market unless they explicitly state other compatibility. Therefore, the data pins are floating. Any charger can be used at its max rating if you trick the Android phone with the homemade cable described above. Of course, then it becomes a power-only cable, useless for data. Clearly, OEM chargers for Android phones short the data pins internally so your OEM cable can be used with a wall charger (fast) or with your PC for data connections and nominal (slow) charging.
So the powergen mentioned above has two 2.1A ports, one labeled NA (non-apple) and A (apple) so you don't need to worry about mix-n-match devices and cables. Any USB cable will fast charge on the appropriate port. With my homemade cable above, my Galaxy Nexus will fast charge on either port.
Fast forward to the G2... Just got it yesterday and while in the car, I noticed my homemade cable only permitted SLOW charge on either port. Huh. Kinda a head scratcher. I ran in the house and got the OEM LG cable and both ports worked with FAST charge. So I tried one more thing, I grabbed a regular USB cable and observed the following: the phone went into FAST charge on the apple port and SLOW charge on the non-apple port. I can only assume that LG is detecting fast charge in a different way. The fact that a standard USB cable doesn't work with the data pins shorted at the charger but the OEM cable does makes me think there is something about LG's cable that allows it to pull max power from the charger. FYI, I plugged the OEM LG cable into a 850mA Motorola AC charger and it registered as SLOW charge.
kyler13 said:
To short the data pins, I actually cut a USB cable, stripped back the insulator, re-soldered the +5V and ground wires, soldered together the data pins on the microUSB side of the cable, and stagger cut the data wires on the other side. Prior to the re-soldering, I slipped some shrink tubing on one end of the cable to re-insulate everything. Not for the faint of heart.
Background for those that don't know... Typically, Android phones look for little to no resistance on the data pins to detect a high current charger. Any other load triggers USB mode since most PC's are only designed to supply 500mA via USB. I assume this is a safety issue to prevent overdrawing a PC's port. Apple operates differently. They look for some nominal resistance as USB and switch to fast charge under open or some higher resistance. Most chargers >500mA are designed for the iPhone market unless they explicitly state other compatibility. Therefore, the data pins are floating. Any charger can be used at its max rating if you trick the Android phone with the homemade cable described above. Of course, then it becomes a power-only cable, useless for data. Clearly, OEM chargers for Android phones short the data pins internally so your OEM cable can be used with a wall charger (fast) or with your PC for data connections and nominal (slow) charging.
So the powergen mentioned above has two 2.1A ports, one labeled NA (non-apple) and A (apple) so you don't need to worry about mix-n-match devices and cables. Any USB cable will fast charge on the appropriate port. With my homemade cable above, my Galaxy Nexus will fast charge on either port.
Fast forward to the G2... Just got it yesterday and while in the car, I noticed my homemade cable only permitted SLOW charge on either port. Huh. Kinda a head scratcher. I ran in the house and got the OEM LG cable and both ports worked with FAST charge. So I tried one more thing, I grabbed a regular USB cable and observed the following: the phone went into FAST charge on the apple port and SLOW charge on the non-apple port. I can only assume that LG is detecting fast charge in a different way. The fact that a standard USB cable doesn't work with the data pins shorted at the charger but the OEM cable does makes me think there is something about LG's cable that allows it to pull max power from the charger. FYI, I plugged the OEM LG cable into a 850mA Motorola AC charger and it registered as SLOW charge.
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I have pretty much the same thing, had a cable that would only do slow charge, so I stripped the wires back, and on the micro usb side I cut the green and white(data) and twisted them together. Now its fast charge no matter what charger I plug this cable into.... not sure why urs isn't....
My AT&T branded charger doesn't give me the slow charge notification.
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droidiac13 said:
My AT&T branded charger doesn't give me the slow charge notification.
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Yes, but its not a 2 amp charger. We want a bigger fast charge vehicle charger...
I tried the USB plug in my car (Scion 2012) and two different Belkin cigarette/USB chargers today. The USB and one of the Belkins gave slow charging. The other Belkin did not -- worked fine. They were supposed to be identical, but I had suspected one was a fake. Guess I was right.
I just use the usb cable that came with their phone and plug it into my auto usb or the car's 110 outlet.
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Tylt. Flat ribbon charger works.
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