I would like an additional charger as supplied in the box: from a wall socket 220v to mini usb. I see many usb charge cables but does anyone know where I can get a wall charger?
I heard usb charging is a lot slower and a usb-pc is not always available to plug into....
Not sure what country you are from...
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=5841022471&category=67832
It says its for the iPOD but it's got the same 5.5v output required - as with all USB devices.
Just do a search for USB Wall Chargers on the net and you'll get loads.
thanks Looks good. Does anyone know if charging this way actuallu IS faster then charging from pc?
Depends on the power output of a given charger...
USB charging is done at 5 volts and 0.5 amps (more or less - I seem to recall that the wall charger for the Blue Angel delivered about 0.7 amps and a bit below 6v, possibly 5.5).
Differences in speed of charging may be achieved if the supply current is higher (logically, since power = volts * amps) although I would be very surprised if the device did not have current limiting hardware in place, which may reduce or remove any advantage.
This means that it should be possible to charge the device faster (assuming it is not precisely self regulating) with a higher power output wall charger than a Windows managed PC. Most people selling USB wall chargers should specify the volts/amps of the charger and I would be suspicious of the seller if this were not the case! Personally, I'd recommend buying a (good - beware of cheapy!) retractable sync/charge cable and both wall and car power adapters with a USB socket as it allows you the most flexibility from the smallest physical amount of kit.
HTH
Anybody tried to use standart HTC 5V wall charger for Flyer?
I have HD2 and its charger can safely give 1A. This type of chargers have USB data pins shortened. So all HTC devices conneced by standart USB cable identifies it as AC charger. I have tried to connect Flyer for a half a minute. Charger was identified as AC and as I remeber (not shure...and afraid to test once more) Flyer was sucking more than 1A (Battery monitor pro).
Flyer AC charger is 9V 1.62A, standart charger 5V 1A so question is do Flyer detects difference between Flyer charger and Standart 5V charger? Is it safe and possible to use standart 5V charger?
yes you can use standard USB, it will just charge slower
DigitalMD said:
yes you can use standard USB, it will just charge slower
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Have you tried or you just think so?
If flyer tries to get more than 1A, yes it will charge slower, but it will also burn charger.
I charge with reg usb all the time
Sent from my PG86100 using XDA App
I do it routinely. The device cannot draw more than the usb port will supply. PC ports supply only 0.5 amp. So they will only work if you turn the power off the Flyer. Wall chargers vary, some supply 1 amp. The original is 9v 1.6 amp were usb chargers typically are 5v so they will charge slower, much slower in some cases.
DigitalMD said:
I do it routinely. The device cannot draw more than the usb port will supply. PC ports supply only 0.5 amp. So they will only work if you turn the power off the Flyer. Wall chargers vary, some supply 1 amp. The original is 9v 1.6 amp were usb chargers typically are 5v so they will charge slower, much slower in some cases.
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Sorry for last several anoying questions. Just want to be shure.
1. Do you use HTC charger or other vendor? In most cases only HTC 5V chargers are identified as 1A AC chargers. If not - device will not request more tha 500ma in order not to burn USB port (device thinks that it is port in that case)
2. Did you see that Flyer identified charger as AC source?
3. Did you charge when battery was less than 10%, what was charge current value on Flyer
Ok, now its getting annoying, did you actually read the information I put in the post you quoted? You just ask me the same questions I already answered.
The chargers all run on AC and produce DC . Flyer original output is 9 Vdc 1.6 amp .
DigitalMD said:
Ok, now its getting annoying, did you actually read the information I put in the post you quoted? You just ask me the same questions I already answered.
The chargers all run on AC and produce DC . Flyer original output is 9 Vdc 1.6 amp .
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Sorry but I think you did not gave the anwer. My english is not so good so maybe the question was not clear. I will try to explain once more, it is up to you to answer or just end this conversation/thread if you think i asked same stupid question once more.
1. Usually non HTC 5V chargers on HTC devices are identified as USB port and thats why devices draws no more than 500mA. It made so no to burn USB port.
2. All 5V HTC chargers on HTC devices are identified as AC 1A, so devices try to get as much as thay can (usually phones request less than 1A).
3. HTC Flyer with empty battery can request no more than 9*1.6A=14.4W. Flyer charger can handle that. Standart can handle only 5*1A=5W.
The question was: do 5V 1A HTC charger will not burn because Flyer identifies charger as AC and can request more than 1A. USB ports usually have protection from current. I do not know if 5V HTC chargers has protection or do Flyer identifies difference between 9v and 5v chargers and sets max current it can get from charger?
extra pins not present on a usb cable for mains charging. if using usb cables the the flyer is a usb device and has the same power restrictions as any other device...simple as that.
globatron said:
extra pins not present on a usb cable for mains charging. if using usb cables the the flyer is a usb device and has the same power restrictions as any other device...simple as that.
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You are not right.
HTC 5V HTC mains charger comes with standart USB cable with no extra pins. Thats true. But mains charger has Data+and Data- shortened inside what makes HTC phones think that it is mains... with any USB cable. So power restrictions will not be as for USB....but as for AC. I have tested that in practice. I made belkin car charger and iphone charger able to be treated as mains chargers just by connecting pins (iphone charger data pins should be disconnected from schema before connecting. I have secret how to connect pins without opening unopenable iPhone charger....).
So the question is Flyer is able to identify mains 5V1A and 9V1.6A difference and do it apply different restrictions. Now for both shows it as AC source and I think sucks as much amps as it can up to 1.6A. So teoretically it should burn 5V charger if it will suck more than 1A.
What are you trying to do exactly?
---------- Post added at 06:29 PM ---------- Previous post was at 06:28 PM ----------
by the way, it is standard, not standart.
I use the Flyer with a variety of USB wall chargers, car chargers and PC ports and have never experienced fire or explosion, only charging and slow charging. Are you trying to figure out how to use a different charger and still get a rapid charge rate?
Ok, I think I understand what the question really is but it is poorly phrased.
On my previous statement I agree with your answer in terms of how it is possible to read what I had said, in fact probably the logical way to read it on re-reading what I wrote, what I meant was electrically present, not that there were extra physical pins, whether electrically present is hi or lo doesn't matter.
If the question is can you rapid charge at 5V from a sufficiently powerful 5v then the answer is no, even if you pull D+ and D- to ground. Also it is highly likely that in the AC charger a resistor rather than direct connection is used to pull them to ground and these resistors could be electrically significant in the overall charging circuit.
The most probable reason for this is that there are two parallel charging circuits in the flyer ( almost certain of this ), and hence why 9v is used. The charge voltage for a 3.7v battery is 4.2 volts and somewhere around 500-750mA, the second charging circuit will have an isolation circuit to ensure that it is only engaged for charging purposes and does not directly feed the tablet that would be the purpose of the modified connections of d+ and d-, activate the secondary charging circuit.
Assuming you feed the device 5v from usb that would mean that the second circuit would receive a 0.8v supply, probably (hopefully) not enough to activate it so you just burn up the extra as heat in the circuit. In theory you would see a higher current draw by asking the flyer to run as if it was connected to an 9v supply when you connect a 5v supply. Best and most likely case scenario you're just being inefficient, medium case you burn out a component or protection (eg thermal fuse), worst case scenario you reverse the battery and it gets damaged or explodes.
globatron said:
Assuming you feed the device 5v from usb that would mean that the second circuit would receive a 0.8v supply, probably (hopefully) not enough to activate it so you just burn up the extra as heat in the circuit. In theory you would see a higher current draw by asking the flyer to run as if it was connected to an 9v supply when you connect a 5v supply. Best and most likely case scenario you're just being inefficient, medium case you burn out a component or protection (eg thermal fuse), worst case scenario you reverse the battery and it gets damaged or explodes.
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This is what i meant! I was curious which one of scenarious will happen in practice.
From DigitalMD post above I can make a conclusion that in reality we will have 1st scenario (just inefficient).
Thank you guys.
I recommend you look at the following USB battery charging spec. A properly designed charging circuit will have current limiting and can recognize the power capabilities of the port vs. device vs. cable. This is why some charging circuits use a special cable vs. a standard USB data cable.
http://www.usb.org/developers/devclass_docs/Battery_Charging_V1_2.zip
Nice link, it's got some pretty decent information in it.
Honestly to answer your previous question I can't tell, I'm guessing nothing except some heat, but that doesn't mean that you couldn't thermally damage something ( eg the screen ).
globatron said:
Nice link, it's got some pretty decent information in it.
Honestly to answer your previous question I can't tell, I'm guessing nothing except some heat, but that doesn't mean that you couldn't thermally damage something ( eg the screen ).
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I think that there is no chance to damage Flyer thermally But theoretically, if Flyer wll requests more than 1A charger can overheet and possibly damage the Flyer. But if Flyer can detect that charger as 5V1A and if it can request less than 1A, then it is safe. Also if charger can detect current higher than 1A and can limit it - that also should be safe to use it.
I will read pdf maybe there will be some good info.
I use a self powered usb hub as a daily charger for both my Flyer and Kindle. Works fine. With no "burning out". At work, I use a generic 5v 1a charger, no problems either except for charge speed...
The charge state shows USB instead of AC, so it appears there is some sort of voltage/amp sensing going on?
Sent from my Nexus One using Tapatalk
kardain said:
I use a self powered usb hub as a daily charger for both my Flyer and Kindle. Works fine. With no "burning out". At work, I use a generic 5v 1a charger, no problems either except for charge speed...
The charge state shows USB instead of AC, so it appears there is some sort of voltage/amp sensing going on?
Sent from my Nexus One using Tapatalk
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Your flyer identifies charger and hub as USB and limits current to 500ma. The initial discussion was about the case when 5V1A charger is identified as AC. This case happens when standart htc phone charger is used (eg HD2 charger). That charger has data pins shortened inside that makes HTC phones (conected by standart USB cable) think that charger is AC. Surprisingly Flyer identifies it also as AC. In that case flyer do not limit current and possibly tries to draw 15W from 5V charger which can deliver only 5W ! I think that good chargers should have protection from oveload....
So soldering data pins together in you generic charger would make it more efficient. I modified my all generic chargers even genuine iphone charger and now all HTC and possibly other phones identify them as AC !! But I still not shure is that safe for flyer.
Little bit offtopic:
Yesterday i dissasembled Griffin car charger thas has 2x1A USB ports. In fact there is a chip inside that can deliver up to 3A. The chip is XL1583E1. This chip can be set to deliver other voltage than 5V by changing resistor.
It would be nice to get somewhere flyer pinouts and see if it uses the same pins for 5V and 9V charging. If the same - it means that this car charger can charge flyer as fast as flyer mains charger just coupling data pins (now it has identifications circuitry for iphone -resistors between vcc,data,data,vdd). If not - it means that charger shoud be modified to deliver 9V and special cable with extra pins will be needed also.
you sure are going through a lot of contortions just to do same things that the HTC charger that comes in the box already does. Why not use the adapter made for the device?
I'm trying to reduce how many cables and plugs I use. Currently I charge my phone via micro usb, and was wondering if there is an accessory I can buy that will connect from my micro usb cable and into the Prime's proprietary port so I can charge my phone and tablet of a single plug (my phone overnight and then my tablet the next day). I'd much rather have a small adaptor sitting on my bedside table for when I need it than yet another wire trailing across the floor. My plug socket is tucked behind my bed so simply swapping the usb cable each time isn't really do-able.
Many thanks
Tomlilley said:
I'm trying to reduce how many cables and plugs I use. Currently I charge my phone via micro usb, and was wondering if there is an accessory I can buy that will connect from my micro usb cable and into the Prime's proprietary port so I can charge my phone and tablet of a single plug (my phone overnight and then my tablet the next day). I'd much rather have a small adaptor sitting on my bedside table for when I need it than yet another wire trailing across the floor. My plug socket is tucked behind my bed so simply swapping the usb cable each time isn't really do-able.
Many thanks
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it is do-able if you used a male to female usb adapter. Then you could just plug in the cable you need to charge with.
I have not seen a micro female usb to full size male? I have seen full size to micro.
You could always get a powered USB hub aswell and have both plugged in. I though I read somewhere that the prime charges best when plugged into the wall though.
I'm going to guess your phone charges at ~5v and the prime will want ~12v (link) ...
There are some reports that 5v will "charge" a transformer, but I'm skeptical ...
More than likely 5v would be more of a trickle charge at a slower rate.
@Tomlilley What did you end up doing?
@copc Interesting idea regarding the powered USB hub. Would the following configuration be possible: TF plugged into a power USB hub and charging, an external HD plugged into the power USB hub with the TF accessing the external HD?
Doesn't USB max out at 5v and Prime is 15v by default (it looks like it charges at 12v as well).
I recently purchased the Scosche reVOLT c2 dual usb car charger. Being 2.1A, I was hoping it would work with my new Prime. Unfortunately that is not the case. It's a nice product and works we with all my other USB devices, but no luck with the TF. Unless anyone has any ideas to make it work, avoid this if you are looking to charge your Prime.
-ajs
Even though most car chargers run off 12VDC input, they output only 5V for usb devices. The TF itself should trickle-charge with 5V, but in order to actually fast charge it (or charge while in-use), it requires [email protected] or more (give or take).
You need at least 12v output to charge the Prime at a normal rate. 15v is ideal. Standard USB is 5v.
+1 ^^ although I think I did read somewhere that the Prime will trickle charge on USB if it's off or "not in use"? Can't recall where I saw this...
Xxxxxxxxxxx
Yes, the Prime will charge on a standard USB port, but it will do so very slowly. I have done so myself.
Sent from my SCH-I500 using XDA App
Sorry, delete it.
Has anyone successfully used a 12v usb charger other than the BN ripoff? I have a gmax 2.1a and aluratek 2a and neither one will charge the bn tablet. I get the "not charging" message on the tablet.. so I supposed its getting some juice, but not enough to sustain it. I soldered d+/d- together on both adapters and now both will show ac charging in the nexus - so I know each is getting close to 1amp. Ironically, the tablet will show ac charging if I use the nexus power ac power cube which is rated at 5v / 1amp output. So you would think the 12v usb adapters which are rated the same would work as well.
thoughts?
darby427 said:
Has anyone successfully used a 12v usb charger other than the BN ripoff? I have a gmax 2.1a and aluratek 2a and neither one will charge the bn tablet. I get the "not charging" message on the tablet.. so I supposed its getting some juice, but not enough to sustain it. I soldered d+/d- together on both adapters and now both will show ac charging in the nexus - so I know each is getting close to 1amp. Ironically, the tablet will show ac charging if I use the nexus power ac power cube which is rated at 5v / 1amp output. So you would think the 12v usb adapters which are rated the same would work as well.
thoughts?
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did you read about the 'special' connector that is deeper than the normal ones ? please use the search function for more info.
sure did.. all of this was with the [email protected] cable..
old_fart said:
did you read about the 'special' connector that is deeper than the normal ones ? please use the search function for more info.
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There's also the part of the equation where the USB adapter must supply a lot more than the 500mA of current that most adapters and computer USB ports are limited to. Mine will say "charging" as long as the adapter puts out around 1A (1000mA) or more and I use the NT's supplied cable. <-- But it still won't charge as quickly as it does when I use a 2A charger such as the one it came with. The factory charger is around 2A and expecting the NT to charge with anything less may not result how you'd like. Just because your phone likes a charger doesn't mean your NT will.
There is more to it than just shorting the D+ and D- pins. If the charger was designed for iPad, then you will also need to remove 4 resistors. Check out the two links in my post relating this issue at http://forum.xda-developers.com/showthread.php?t=1614091
I modded a car charger by just shorting the two pins. My HTC EVO 4G phone showed AC charging but my NT showed USB charging. I opened it up again and removed the resistors network and NT showed AC charging right away. Good luck.
bigdogz - good advice - made an attempt at it but my eyesight and hand steadiness aint what it used to be However, I did find one that works - Scosche reviveII - GUSBC3. Its a 2.1a port for the galaxy tab and a 1amp port for apple. It charges both the galaxy tab 10.1 and the nook tablet on the 2.1a port. It also will charge in ac mode a galaxy nexus from the tab port. The 1a port does not have the d pins shorted, but will charge an iphone.