why? why did motorola use a proprietary charging cable? it would of been so nice to have a micro usb cable to charge the xoom. im very worried one day that needle proprietary cable going to break and it wont charge my xoom anymore.
it seems like motorola is a HUGE fan or proprietary cables, especially the v60 series flip phones.
fondoo said:
why? why did motorola use a proprietary charging cable? it would of been so nice to have a micro usb cable to charge the xoom. im very worried one day that needle proprietary cable going to break and it wont charge my xoom anymore.
it seems like motorola is a HUGE fan or proprietary cables, especially the v60 series flip phones.
Click to expand...
Click to collapse
All the latest tablets have proprietary cables...
fondoo said:
why? why did motorola use a proprietary charging cable? it would of been so nice to have a micro usb cable to charge the xoom. im very worried one day that needle proprietary cable going to break and it wont charge my xoom anymore.
it seems like motorola is a HUGE fan or proprietary cables, especially the v60 series flip phones.
Click to expand...
Click to collapse
Simple, many recent tablets use proprietary cables to allow higher current and faster charge times.
The average usb cable hooked up to your pc provides about 500mA
The proprietary cable for a modern tablet like the XOOM can deliver around
1.5A
With a micro USB cable it would take forever to charge the XOOM. Then people would be complaining about why the XOOM takes so incredibly long to charge, and bashing motorola for the problem. Instead Motorola chose to do it the intelligent way, by separating the charge function to a proprietary cable to allow very fast charging, and including the usb cable for data transfer.
When I see a proprietary cable I don't think - crap why do they do it this way. Instead I think wow great, that means this thing was designed for fast charges.
Digital Man said:
Simple, many recent tablets use proprietary cables to allow higher current and faster charge times.
The average usb cable hooked up to your pc provides about 500mA
The proprietary cable for a modern tablet like the XOOM can deliver around
1.5A
With a micro USB cable it would take forever to charge the XOOM. Then people would be complaining about why the XOOM takes so incredibly long to charge, and bashing motorola for the problem. Instead Motorola chose to do it the intelligent way, by separating the charge function to a proprietary cable to allow very fast charging, and including the usb cable for data transfer.
When I see a proprietary cable I don't think - crap why do they do it this way. Instead I think wow great, that means this thing was designed for fast charges.
Click to expand...
Click to collapse
THANK YOU lol finally someone that understands.....
plus, the input voltage in to the tab is 12v, hard to get 12v from a 5v USB supply...
For a bit more info, I too wondered about USB charging. The limit seems to be when the Xoom is running, the current drain can be upwards of 400 mA so I could see a situation where a USB charger at 500 mA would overload if you did too much on the Xoom during charging. That would be good enough reason to avoid that design mess. "Do not use during charging" would not be sufficent protection. The Moto Mains Charger manages 1500 mA for a couple of hours which is wonderful. Now if only I could charge my Nexus S that quickly
xtkxhom3r said:
THANK YOU lol finally someone that understands.....
Click to expand...
Click to collapse
right? about time
I am really glad that trickle charging is not possible with the Xoom, saves a lot of problems...I just wish they had used a different connector for the power. Something a bit more durable and commonly included in third party multichargers would have been nice...but one can't have everything.
I still support the seperate power cable choice for all kinds of reasons.
Sent from my GT-I9000 using XDA Premium App
Just amazes me that folks will complain about anything and everything. Good grief, it charges in no time and runs more than a day when it does. What more can you expect?
I like the idea of a separate charger, but the only thing I take issue with is the design of the charger it self. Luckily, I just set mine on the dock before bed. The dock doesn't use that flimsy pin, it uses the two gold plates at the bottom to charge.
Kcarpenter said:
I like the idea of a separate charger, but the only thing I take issue with is the design of the charger it self. Luckily, I just set mine on the dock before bed. The dock doesn't use that flimsy pin, it uses the two gold plates at the bottom to charge.
Click to expand...
Click to collapse
going to have to look into that dock cause i'm not to fond of the charger that it has. so the avg. use time is about a day, are you guys mod or heavy users(as you can tell i dont have mine yet ordered and waiting for it to show up)trying to get as much real world use info as i can
i love the proprietary cable. It is SOOO much faster. My Galaxy tab with a 4000 mAH battery took almost 4 hours to charge and i was lucky to get two days usage out of it (standby time and normal usage combined). My Xoom (no idea on mAH size) charges in 2 hours and i get 90 hours usage out of it (mainly standby but still a lot of screen on time, wiht a much larger and brighter screen to power). LOVE it.
Yeah I wouldn't worry about the Cable its seems durable, only thing I AM worried about was how you plug the wires all on the side of the device, I feel like there's abit of give on the wires when holding it sideways, I wish it was more like the iPad.
You know the first time I saw that the tablets used a seperate charging cable I was like, "why?" but then I stopped and think, there's no why a USB (let alone a micro-USB) can charge those suckers, so I'm personally glade that tablet makers did what they did and make it seperate.
I just wish they chose a 30-pin connector instead of this tiny one. The slightest mistake while it's charging (like say you trip over the cord), and there goes your xoom for repair/replacement.
Lets not rule out USB charging. Yes, I love going from 5% to 100% in about an hour. But I also have USB plugged in for hours on end when doing my thang. . That being said, we do not know for certain that USB charge is a hardware limitation. Yes, USB puts out 500mV. But I can tell the kernel to suck in whatever. If the hardware is capable, its doable.
I still think the option should have been given to us. Cuz many if not all of us have micro USB around. I for one only take a single micro USB in my pocket for my phone. So its would have Been nice to be able to charge both device with one charger. But I mean scull charge usually carry me all day. So I don't see it as a major problem right now.
Sent from my Xoom using XDA Premium App
bigrushdog said:
Lets not rule out USB charging. Yes, I love going from 5% to 100% in about an hour. But I also have USB plugged in for hours on end when doing my thang. . That being said, we do not know for certain that USB charge is a hardware limitation. Yes, USB puts out 500mV. But I can tell the kernel to suck in whatever. If the hardware is capable, its doable.
Click to expand...
Click to collapse
e
Its actually 500mA not 500mV. Usb provides 5 volts at 500ma for usb 2.0 and that will be picked up to 900ma in usb 3.0. Even with this in mind it isn't the biggest problem with stoppinh usb charging in the xoom. The issue I believe is in the fact that the current charger is 12 volts and 1.5 amps. That's more than twice the volts at tripl the amperes.
Even beyond the amperage issue charging a battery that is set up to input from a 12 volt source with a 5 volts supply, even if it was possible with existing xoom hardware it would take forever!
I wish there was a way to have both options available for charging. Use the USB if you have no access to a AC adapter, albeit, a slower charge.
It seems that there's a false dichotomy here; the options aren't only trickle charge by usb and wall adapter with the proprietary connection. What about a wall charge via the usb port? I don't see why the usb port couldn't be used for the charge. I can trickle charge my n1 or I can plug it into an outlet, which charges the phone much faster. I'm sure the xoom could have been designed to suck in more power when conected to an outlet.
The only plus with the proprietary port is that we can charge and have the xoom connected to a computer or peripheral at the same time.
Related
Do you think it would be safe to charge the evo with a 2.1 amp car charger? I found one on ebay that says its made for the iPad but I would love a faster charge on my epic.
In general, the slower you charge the battery, the longer it will last. The effect is pretty significant.
I don't know if that much current is safe.
http://www.batteryuniversity.com/parttwo-34.htm
Sent from my SPH-D700 using XDA App
It's more complicated than that. Just because the charger is able to provide 2.1A doesn't mean the phone will actually draw that much current.
The charge control circuitry is built into the phone. You are just providing a +5V rail as the charging power source via a standard USB connection. There is no charge control inherent in USB itself.
Sent from Samsung Vibrant
It will only pull as much as it needs. I use higher amp output chargers and it's not a problem. It will charge faster, regardless of what you use, if you turn the phone off.
jnadke said:
In general, the slower you charge the battery, the longer it will last.
Click to expand...
Click to collapse
Bingo.
Being an Aerospace Electrical Engineer I approve of this message.
jnadke said:
In general, the slower you charge the battery, the longer it will last. The effect is pretty significant.
I don't know if that much current is safe.
http://www.batteryuniversity.com/parttwo-34.htm
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
this is true, but the effect is not that significant, coming from using lithium packs in rc helicopers and cars, the battery will likely be obsolete before you kill it and the batteries aren't that expensive.
kerms said:
Do you think it would be safe to charge the evo with a 2.1 amp car charger? I found one on ebay that says its made for the iPad but I would love a faster charge on my epic.
Click to expand...
Click to collapse
do you have a link and is there a wall charger too? I run a remote desktop app and it destroys the battery, even with the 1 amp charger going the battery just gets lower and lower.
robl45 said:
do you have a link and is there a wall charger too? I run a remote desktop app and it destroys the battery, even with the 1 amp charger going the battery just gets lower and lower.
Click to expand...
Click to collapse
It could be due to the usb micro charging standards... Many chargers do not adhere to the standard, and this may cause some of the newer phones (droid X, galaxy S phones) not to charge at full power. Most older phones simply did not care, and would use all the amperage they could get their hands on.
Basically, if the D+ and D- pins of the USB cable are not shorted, then the device will draw minimal power from the +5v rail. It is probably drawing <500 mah, and could even be drawing as little as 100 mah from the charger.
Getting a proper 1A charger could fix this, but I'd like to test it out myself when I get the chance..
http://www.griffintechnology.com/products/powerduo-for-ipad
These work good. I use the ac one. Only thing is, like some have stated, even when charging when phone is on and using the phone, the battery will still go down. Maybe 2.2 will fix this or a patch.
I'm not going to debate fast vs slow charging. This isn't like debating what is the best charger for AA rechargeable nimh, fast or slow or charging method.
I think there is a serious problem with my charging circuit on this phone. I have no idea if its hardware or software that is controlling the charging circuit but I can tell you that it literally takes forever to charge my phone via USB and this is unacceptable from a consumer standpoint.
I wanted to see how much current the phone was asking for and I was really surprised to see 96mA!!!
No wonder its charging so slow, something is really wrong here, and It doesnt look like a faulty battery. The phone should be asking for 10x this much current.
Can some people post how much current their phones are drawing from the usb port?
If you dont know how to do this, in "device manager" double click on the appropriate "usb root hub" that your phone is connected to and click on the "power" tab. Post results.
You are trying to charge your device on a pc correct?
Sent from my HTC Vision using XDA App
500mah is the max just about any phone will charge at from a usb port, at least without any modifications like fast charge drivers.
USB current, for charging purposes, is and always will be low. Otherwise you would burn up your motherboard. Alternatively it would let the magic smoke out of your phone and it would quit working properly.
Sent from Bonsai 6
+1 to the two posts above me. I suggest getting a wall adapter for your usb and charging it there, you will get vastly superior charging times
Sent from my HTC Vision using XDA App
Top Nurse said:
USB current, for charging purposes, is and always will be low. Otherwise you would burn up your motherboard. Alternatively it would let the magic smoke out of your phone and it would quit working properly.
Sent from Bonsai 6
Click to expand...
Click to collapse
USB current, for charging purposes, should be and always be 500mA. 96mA is not enough to charge one of these phones. You cannot burn up your mother board if the device calls for more than 500mA, as that is all that is available for each usb port.
Ive connected three of my old phones and an EVO and a mytouch Slide, they all ask for the maximum allowed current as they should. I do have a wall charger and it charges fine, Im trying to see if everyone else has the same USB charging problem as me, or if I have a broken phone, or if I just have some bad software on my phone.
Please if anyone can post results it will be helpful.
Hello again,
My G2 is asking for 500ma
Sent from my overclocked G2
PaganAng3l said:
Hello again,
My G2 is asking for 500ma
Sent from my overclocked G2
Click to expand...
Click to collapse
thanks but can you please post results for the an EPIC 4G phone?
Connected to a PC USB port, the Epic 4G will only draw 380ma. Via a wall charger is will only draw 600ma. Hence why charging on a PC is slower. Simple as that.
I also show exactly 96 mA, regardless of which USB port I am plugged into. Practically new motherboard, so I know the USB current isn't an issue. New Blackberry USB cable (far superior to stock Samsung cables).
IIRC, 500ma is the max draw per hub, not USB port. This is why people get powered add on hubs so they can have components that take more draw than a computer USB port will give.
Sent from Bonsai 6
Top Nurse said:
IIRC, 500ma is the max draw per hub, not USB port. This is why people get powered add on hubs so they can have components that take more draw than a computer USB port will give.
Sent from Bonsai 6
Click to expand...
Click to collapse
500Ma is NOT the per 'hub' power supplied, 500Ma is the PER PORT current max. EACH port on the motherboard will supply up to 500Ma, trying to draw more will not work. It won't burn it out, it just won't supply any more than that. If you have 8 ports on your MOBO, you will get a total of 4A of current in total, not exceeding 500Ma per port. If you hookup an UNPOWERED hub to your mobo, the total draw still cannot exceed the 500Ma. If the hub is powered, it will provide 500Ma to each port on it, and draw virtually none from the MOBO.
This is why you see some external devices with dual USB cords, or a single with a Y. This is because it will combine the 500Ma from each port to power the device for up to 1A of current.
96Ma will not charge the phone, it's not even enough to power the phone while making a call.
How are you measuring your current draw? Try other USB devices. Wall charging takes between 2 and 3hrs to charge depending if the phone is on and its current draw for what it's doing.
Top Nurse said:
USB current, for charging purposes, is and always will be low. Otherwise you would burn up your motherboard. Alternatively it would let the magic smoke out of your phone and it would quit working properly.
Sent from Bonsai 6
Click to expand...
Click to collapse
Pretty much every USB host device I've used can easily deliver 1A. Most new machines can deliver 2A (such as ASUS boards and Macs) over USB. The Epic still charges way too slowly even off a wall charger. It'd be nice if it drew 1A instead of ~600mA. Most other devices use much higher charge currents when plugged into AC.
As for the Epic's charge current, I think the USB driver on it just reports charge current incorrectly.
Orbiting234 said:
Connected to a PC USB port, the Epic 4G will only draw 380ma. Via a wall charger is will only draw 600ma. Hence why charging on a PC is slower. Simple as that.
Click to expand...
Click to collapse
thanks to the two people, that haven't been derailing this thread into a "how usb ports work discussion".
if anyone wants to help instead of arguing over how usb ports work, it would be really helpful to know what rom and kernel you are using when you tested your epic 4g device.
Im especially interested to know this information about orbiting who is getting 380mA. Im also interested in how you measured measured the 600mA from the wall charger.
Its posted at the end of the OP how to see how much current your phone is asking for.
I think the charge controler on the Epic will alter the current draw depending on how close it is to fully charged . Once it gets above about 90% charge the current should taper off. this is to prolong the battery life.
The Normal charging times starting at about 30% is under 3 hours on a wall charger for me. I can go from about 70% to 100% om my laptop in about an hour.
poit said:
I think the charge controler on the Epic will alter the current draw depending on how close it is to fully charged . Once it gets above about 90% charge the current should taper off. this is to prolong the battery life.
The Normal charging times starting at about 30% is under 3 hours on a wall charger for me. I can go from about 70% to 100% om my laptop in about an hour.
Click to expand...
Click to collapse
I already know this, and its not what I asked for.
poit said:
I think the charge controler on the Epic will alter the current draw depending on how close it is to fully charged . Once it gets above about 90% charge the current should taper off. this is to prolong the battery life.
The Normal charging times starting at about 30% is under 3 hours on a wall charger for me. I can go from about 70% to 100% om my laptop in about an hour.
Click to expand...
Click to collapse
mrhocuspocus said:
I already know this, and its not what I asked for.
Click to expand...
Click to collapse
I appologize for wasting your time, but let me elaborate.
Right now my phone is at 89% charge, and right now the "Power Required" field in the USB root properties is showing 96 ma. I doubt that is an actual measured current, more likely it's what the port controller on the Epic reports as a minimum current required. What I can tell you is that even with that info, my phone charges fine. Seems unlikely that it's only supplying 96ma because I'd expect the phone must draw 40 ma or so just to idle.
What would be more useful would be an app on the phone that polled the charge controller to give us actual voltage and current data. I had one on my old TP2 that was great, but I don't know about one for Android.
Edit: in the time it took to type this reply the State of Charge went from 89 to 92%, yet the properties still shows 96 ma. I think the controller is getting way more than 96ma, so that number is likely bogus.
I guess that wasn't what you asked for either, but maybe it is stilll useful
poit said:
the USB root properties is showing 96 ma. I doubt that is an actual measured current, more likely it's what the port controller on the Epic reports as a minimum current required.
I guess that wasn't what you asked for either, but maybe it is stilll useful
Click to expand...
Click to collapse
no need to apologize, I could explain to you why what you think is "more likely" is actually less likely. but it would only further derail this thread. feel free to pm me if you are interested.
all im interested in is three things:
current asked for by phone from pc usb, rom version, and kernel version.
someone already reported 380mA. but i have no idea what software he is on.
I'm running completely stock EB13. On my newer laptop with Windows 7 it shows 96mA in the device manager. On my ancient Dell PC at work running XP, it shows 96mA as well. In both cases I'm plugging the phone directly into a USB port, no external hubs.
xxmastermindxx said:
I also show exactly 96 mA, regardless of which USB port I am plugged into. Practically new motherboard, so I know the USB current isn't an issue. New Blackberry USB cable (far superior to stock Samsung cables).
Click to expand...
Click to collapse
I'm running the latest Syndicate 1.0.1 with their latest 1.0.3 kernel. My quote above is when I was running Syndicate 1.0.0 and kernel 1.0.1.
If I go back to stock for some reason, I'll post those numbers up too.
Sent from my SPH-D700 using XDA Premium App
So I realized that if I charge my phone using the USB ports on my laptop, the phones batter lasts much longer than if I charged it through the power outlet in the wall.
I didn't take any screenshots because I didn't think of it at the time, but through the laptop I got about 2 days and 14 hours with moderate use and I had 18% battery left.
Through the wall charger, I get about 18 hours with moderate use.
Can anyone else confirm?
Not sure, but i do feel that it charge slower on the USB port of my laptop. Maybe it have something to do with your theory.
Centranly!
USB port can give max 500mA but the wall charger can supply with 700mA (+40%!!!)
I have a charge-only cable that charges over my MBP's USB faster than any AC adapter I've tried. Charges last about the same regardless of power source though...
Sent from my MB860 using xda premium
emandt said:
Centranly!
USB port can give max 500mA but the wall charger can supply with 700mA (+40%!!!)
Click to expand...
Click to collapse
USB 2.0 will provide up to 500mA while USB 3.0 can provide 800mA. Stock Atrix wall charger I have is 850mA.
How do you verify what mA you're using? Is there a good tool for that?
CaelanT said:
USB 2.0 will provide up to 500mA while USB 3.0 can provide 800mA. Stock Atrix wall charger I have is 850mA.
Click to expand...
Click to collapse
IIRC, these are minimum specs for the standards. Could be wrong, but I believe that true output varies card to card/port to port.
Sent from my MB860 using xda premium
Plasmamuffins said:
So I realized that if I charge my phone using the USB ports on my laptop, the phones batter lasts much longer than if I charged it through the power outlet in the wall.
Click to expand...
Click to collapse
I've heard this theory before, but didn't see noticeable difference on my phone to back this claim.
I do agree with OP that charging the phone connected to a laptop USB port would give longer battery life. I have noticed this on several occasions already. I also agree the charge process would be much slower. With my phone, with 5% charge or less, the battery icon randomly doesn't animate while being charged.
That a side, I'm also sure something is broken in Atrix design, be it hardware, battery, or both but something is not right. I can't even charge my phone from a power point with the supplied cable and the plug [UK].
I know Motorola won't admit neither fix this problem in Gingerbread but might do, quietly, in ICS. One other possibility I can think of is that the supplied plugs are the culprit.
Today i charged the phone from my laptop, and im not feeling any difference at all. Its discharging at my usual pace. :/
Sent from my MB860 using XDA
Furthermore to my previous post, I have finally found the opportunity to test my phone with a Blackberry charger and it started charging the phone from the power point. That means the Motorola UK plugs I have are broken.
I'm arranging to purchase a Blackberry charger now. Don't want waste my time and money with Motorola anymore.
Warning: When I make this post, I have no intention of being rude. Moving on.
Lately I've seen lots of posts like, "Wireless charger, cheap on Amazon!" and "Wireless charger, 40$!" Ok, thanks for finding these things for us! But is wireless charging practical? Why is wireless charging being made such a big deal? Persononaly, I cant justify avoiding the phones intended function, just to charge wirelessly. Not to mention, I have to pay 40+$ for said wireless charger. I mean really, is it that important to "preserve the USB port"? On the other hand, I do think wireless charging is a neat idea, but only that.
So I guess my question is, are there reasons that make this worth my money? What are they?
Sent from my Nexus 4 using Tapatalk 2
Laziness and neatness for me. It's less work to place it on a wireless charger than to have to find the usb cable and plug it in. Plus it eliminates the eyesore of having an unplugged USB cable right next to my bed all day.
It's great that Google included it for those who have a use for it but I have to say I'm with the OP. It just doesn't make much sense to me to have to buy an expensive device that takes up space to save a few seconds spent plugging the device in once a day. Different strokes for different folks, eh. Plus I'd have constant paranoia about whether the device was actually going to keep charging while I sleep (irrational, I know. Nobody said I had to make sense.) That's why we love Android (or not, for the trolls lol)
nbell13 said:
Laziness and neatness for me. It's less work to place it on a wireless charger than to have to find the usb cable and plug it in. Plus it eliminates the eyesore of having an unplugged USB cable right next to my bed all day.
Click to expand...
Click to collapse
Yeah, I guess that's reasonable... But is it really worth 40+$ to save yourself a few seconds everyday?
Sent from my Nexus 4 using Tapatalk 2
Alot of Nexus 4 users upgraded from the Gnex. The Gnex had a horrible USB port. If you go to the Gnex Q&A section and search for bad USB port you will get easily over 100 threads. And although the Nexus 4 is obviously a different manufacturer, it was enough to make us paranoid. Add the paranoia to the fact that wireless charging is just cool new technology definitely makes it worth $50 TO SOME people.
I like cables. Seriously. Cheap and reliable. But that's just me.
I think the idea of them is great, but they just aren't for everyone. I'd love one, for the visuals but in all honesty, I have no reason to own one. For one, I don't even have a good surface I could put it on, most of them have something on or are not near a plug socket.
The wireless charging orb from Google advertises charging the Nexus4 in 4 hours.
In my experience the wall charger does it in about 2 hours.
I've been using my Nexus4 for navigation in my car. A car mount with wireless charging
indeed sounds great - plugging and unplugging the USB port in the car is uncomfortable.
But I discovered that with the GPS on and the screen at high brightness the phone
can not be properly charged with a 0.5A car lighter adapter. 2A ones do work.
So I wonder if a wireless charging car mount is even a possibility. It is questionable whether it
can pump the necessary power to run the phone in such a demanding application.
Mind you my setup can get pretty hot at times on the USB and it's the dead of winter in here.
Hey guys, while this information may be redundant to some, this is my first 2A charging phone having come from a GS2. A few note's i thought i'd share about fully utilizing the maximum charging of this phone. Using Elixer app, i was able to determine a few tips when charging
CABLE LENGTH MATTERS
I went out and bought some nice long monoprice cables, 10' and 15', i hated the feeling of being sucked to the nearest wall when you wanted to charge and use your phone. Plugged it into my nice new S4 wall port with a 10' cable, and checked the amperage being sucked in, to my surprise it was no where near the 1900mA max i should be getting. Went to the 15', even lower current (duh, for those who weren't able to put that together), went back to my 6' cable, boom, back up to 1900mA.
TLDR: 6' max for maximum charging
PAY ATTENTION TO 3rd PARTY SPECS
often times these specs are misleading on amazon and such. Often times you will see a 2A car charger with two ports! Awesome, but sadly each port is usually rated for 1A each. This will not be enough to output a full 1.9A (1900mA) for your device. You need to look for 3.1A rated two port items (2.1A and 1A port), or 2/2.1A output for single port chargers, or for true dual charging, a 4.2A rated with each port rated for 2.1A. They do exist.
Also, pay attention to whether the device is iPAD (or any dumb iDevice) certified or marketed to the iCommunitiy. Often times even though the dual port chargers with the 2.1 and a 1 amp port, the 2.1 amp port does NOT have the correct data ports shorted out. What this means is how the phone detects the power source. When you hook your phone up to a computer, there are channels in the USB cable that tell the phone it will be using data, this then limits the amount of power it will draw. The iPAD chargers are set up this way where the data ports are not shorted out, so your phone will not suck the full amount of power. To bypass this, you either need 'CHARGING ONLY' USB cables, which short out this channel for you, or you need to mod the charger with some light soldering. Often times i find this iPAD issue on the ones rated for 2.1A, the 2A chargers generally do not have this issue (just a generalization on the marketing of the chargers, not a fact)
do some reading on the spec's before you blast the product, i hate it when people bash it when they buy the wrong thing and it's their own fault for not taking the time to research it. And if it's not clear, don't buy it!
Ok, that's all i have for now, hopefully this helped some people out there. make sure you do your reading before you write up posts about your phone charging slow, or bash a product you bought because you didnt understand what it was truly designed for.