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I tried to charge my A700 with a HTC USB charger, but it didn't work. Can anybody confirm that the A700 only can be charged with the original Charger and not with any micro USB cable?
Sent from my HTC HD2 using XDA
schm1dt said:
I tried to charge my A700 with a HTC USB charger, but it didn't work. Can anybody confirm that the A700 only can be charged with the original Charger and not with any micro USB cable?
Sent from my HTC HD2 using XDA
Click to expand...
Click to collapse
I tried several ones and none worked.
Thanks for confirming, that's really bad news.
Sent from my HTC HD2 using XDA
But this was well known befor the device was available. This is necessary because of the huge power pack.
The original charger can provide 12V and 1,5 A. The USB specification is only 5V and 500 mA.
Did you try to charge the HTC with the acer charger ? you cannont plug it ! they added a pin
Out of couriosity,
in this preview they tell us it would charge on USB???
http://youtu.be/Zy736u97xJA
Not good News at all, im lucky i did not preordered this device, its a no go for me...
Can anyone try to charge over USB while the device is turned off, maybe this works?
Greetz Tokl
Tokl said:
Can anyone try to charge over USB while the device is turned off, maybe this works?l
Click to expand...
Click to collapse
No, it doesn't take any power from regular USB pins.
One has the choice: big power pack or loading by USB. I prefer the running time of this device.
Edit: Loading via USB would take over 24 houres for sure.
Now I found also 12V/1.5A on the right side of the housing of the A700. OK so USB is not for charging.
Did someone already find a car charger I couldn'd find at Amazon. (or should we discuss that in the other thread?)
Sent from my A700 using XDA
schm1dt said:
Did someone already find a car charger
Click to expand...
Click to collapse
Not yet, I think third party suppliers just need a bit more time.
I have a different experience to your's.
I've tested USB charging with two different USB-chargers. One from Nokia (5V, 1200mA) and one from Samsung (genuine SGS2 charger). Both charge the A700 in stand by mode with about 4% per hour and up to 100% battery capacity. The android battery info does not say "charging" but it does!
When the A700 is switched on my 5V chargers are to weak to charge it.
Shudushi said:
I have a different experience to your's.
I've tested USB charging with two different USB-chargers. One from Nokia (5V, 1200mA) and one from Samsung (genuine SGS2 charger). Both charge the A700 in stand by mode with about 4% per hour and up to 100% battery capacity. The android battery info does not say "charging" but it does!
When the A700 is switched on my 5V chargers are to weak to charge it.
Click to expand...
Click to collapse
Nice info, but i guess the charging led is off too ?
Shudushi said:
I have a different experience to your's.
I've tested USB charging with two different USB-chargers. One from Nokia (5V, 1200mA) and one from Samsung (genuine SGS2 charger). Both charge the A700 in stand by mode with about 4% per hour and up to 100% battery capacity. The android battery info does not say "charging" but it does!
When the A700 is switched on my 5V chargers are to weak to charge it.
Click to expand...
Click to collapse
Confirmed
I charged my A700 with my HTC USB charger (HTC TC E250) in standby mode this night. It charged from 23% to 64% in about 10 hours. There was nothing at the A700 that showed it is charging.
To be honest, 4% per hour is "nearly not charging".
schm1dt said:
Confirmed
I charged my A700 with my HTC USB charger (HTC TC E250) in standby mode this night. It charged from 23% to 64% in about 10 hours. There was nothing at the A700 that showed it is charging.
To be honest, 4% per hour is "nearly not charging".
Click to expand...
Click to collapse
This is known as trickle charge. The device might charge if the micro USB provides enought mili amps AND the device does not need much power when connected (i.e. screen off).
I really doubt that the device will charge on USB when the screen is on, but on the other hand the device will definitly discharge slower when connected to USB.
I have a small calculation to explain things:
The original charger operates with 12V at 1.5 Amps = 18 Watts (which is not USB compatible so they hat to change the jack to ensure it will not be pluged in to a normal USB device and damage it)
If you would like to have the same Power over USB with its 5V max voltage you would need at least 3,6 Amps. Now that is far to much for those little pins on the micro USB jack and the currency would damage the pins when pluggin in and out.
USB standard specification normally is 500mA = 0,5 Amps ( -> 2,5 Watts in comparison with 3,6 Amps 18Watts)
So I think Acer has done a quite nice compromise.
Hope that clarifies matters a bit.
ninjaw said:
Nice info, but i guess the charging led is off too ?
Click to expand...
Click to collapse
Confirmed, no charging LED with standard 5V charger. Orange LED while charging only with original 12V charger.
mearoth said:
This is known as trickle charge. The device might charge if the micro USB provides enought mili amps AND the device does not need much power when connected (i.e. screen off).
I really doubt that the device will charge on USB when the screen is on, but on the other hand the device will definitly discharge slower when connected to USB.
I have a small calculation to explain things:
The original charger operates with 12V at 1.5 Amps = 18 Watts (which is not USB compatible so they hat to change the jack to ensure it will not be pluged in to a normal USB device and damage it)
If you would like to have the same Power over USB with its 5V max voltage you would need at least 3,6 Amps. Now that is far to much for those little pins on the micro USB jack and the currency would damage the pins when pluggin in and out.
USB standard specification normally is 500mA = 0,5 Amps ( -> 2,5 Watts in comparison with 3,6 Amps 18Watts)
So I think Acer has done a quite nice compromise.
Hope that clarifies matters a bit.
Click to expand...
Click to collapse
Thanks M8,
this cleares things.
Still waiting for the 3G/4G Device here in Germany
Greetz Tokl
On the A510, when charging the battery via USB, the icon does not indicate it.
That must be the same on the A700.
DЯΦ[email protected]П said:
But this was well known befor the device was available. This is necessary because of the huge power pack.
The original charger can provide 12V and 1,5 A. The USB specification is only 5V and 500 mA.
Click to expand...
Click to collapse
Since USB 2.0 version :
"Several changes and increasing limits including allowing 1.5A on charging ports for unconfigured devices, allowing High Speed communication while having a current up to 1.5A and allowing a maximum current of 5A"
Source : wikipedia.org
Fortunately we are not limited to 500mAh, otherwise we could not quickly recharge our current smartphones .
There are some USB/AC adapters available that put out 2A of juice instead of the typical 1A. For those in the US, check out www.monoprice.com -> they're my go-to source for inexpensive spare cables & such.
It seems that finding a cheaper charger for the A700 isn't a simple task. I had to wade through a lot of cross references with some unintentioned misinformation. First thing was the model number. It's the A510 that is most like the A700 not the A500. Though the A500 does share some similarities it's not the closest match.
When I look for any type of charger, I make sure that the output voltage is correct and the amperage requirements are correct. Looking at the A700's charger, the manufacturer managed to squeeze a lot of info onto it. Amperage is what I always try to find. That is the total amount of current it can handle and deliver to the device connected to it. The A700's charger can handle 1.5 amps. So, the A700 sucks up a quantity of 1.5 amperes of electrons in order for the battery to fill up to it's capacity. That is the load the tablet's battery presents to the charger. Make sure that the charger bought for the A700/A510 can handle at least 1.5 amperes or the wall wart will be OVERLOADED. This is where the charger begins to overheat, smoking warning signals may start coming from the plug and your're asked for a donation for the local voluteer fire department. Besides the voltage which is 12 volts dc, load current requirement is the most important value I make sure is correct for saftey's sake. It is alright to get a charger that has a higher amperage rating but the voltage must be the same, 12vdc for the A700. It just means the charger can handle a larger load.
The only adapter I could find was the original Acer product, mainly because of the unique USB dual purpose connector interface. There is a little diagram of the pinout for the plug on the charger. Using a magnifing glass, I could barely make out the pins the +/-12vdc are attached. Pin P1 is +12vdc and pin P12 is -12vdc. It looks almost beyond a humans capabilities to make or solder together a short plug interface conversion cable in order to use other 12vdc/1.5 A chargers.
I've read in the forums some uncertainty about the proper specs for a replacement charger for the A700, that's why I wrote this post. Maybe , this will help clearup some of the confusion and not add to it. I've also noted a lot of chatter about using a USB cable with the micro USB plug to charge the A700 tablet. Apparently, USB charging can be acheived but it is very slow ( 24 hours or more ) and the amber/white power LED does not indicate the tablet is charging or has finished charging.
If anyone has more info about the A700 charger please reply or post....
Thanks All...
Hi All!
I know that it could be difficult for you to check this Polish site but you can find there a charger that I am going to buy. It has some changeble plugs - also micro usb.
link:
tridex.pl/ramka4.php?menu=towar1&symbol=9396
I think all what you have to do is to look for this kind of a charger - MW3R15GS, btw you can see this name on the original one...
Best regards
Gregork
Acer A701
Save your money and your A701. This thing has only a standard micro-usb plug-in. Check the connector of your Acer charger ... look really close and for better comparison hold a micro-usb-connector from a standard cable next to it. The connector from Acer is longer .. why? because the first row of pins that you can see are not the same ones that fit in a micro-usb-jack. Look deeper into the connector from Acer and you will see a second row of pins.
So if you use this charger with the adapter from that site and set a higer voltage you might fry the usb from your tablet. Sorry to disapoint you but better now than later with a broken tablet.
hey
i have the tablet almost 8 month (a700)
and i don't remember this issue was from the begging
the only option to charge the tablet is only with the original cable which mean that i cannot charge it when connected to pc or with other cable/
can anyone tell me if this is the normal behavior?
You can charge your A700 also by using a micro USB cable (+ charger). I already did and there is a thread about. The A700 won't show you that it charges and charging is really slow. See here.
best regards
schm1dt
I bought a MHL Adapter (microUSB - HDMI) from DealExterme [1].
It works well, even without power, but when I put the original charger (2A), the S4 starts charging but can't even hold the charge. The charge will slowly dropping over time.
Is this normal?
[1] MHL to HDMI Adapter Cable for Samsung Galaxy S3 i9300 / S4 i9500 / Note II N7100 - Red + Black ($9.40)
dx.com/p/217340
Yeah this tends to happen when the phone is draining more battery then the charger is charging the phone.
Even with de 2A charger? This is a lot of power!
Not sure if that's what happens or the MHL adapter that doesn't pass the full 2A for the S4.
Someone who has the original Samsung MHL adapter can tell if the same thing happens?
I don't have this problem with the official oem samsung adapter.... Even in the manual it says to use a 2a charger from samsung to get power...
Sent from my Samsung Galaxy S4
big samm said:
I don't have this problem with the official oem samsung adapter.... Even in the manual it says to use a 2a charger from samsung to get power...
Click to expand...
Click to collapse
Great to know that!
Can you confirm that by using the official Samsung adapter + 2A charger the phone battery doesn't drop?
Other questions:
1. What's your S4? I9500 or I9505?
2. What's your firmware? Stock? Google Edition? Other?
3. What's your kernel? Stock?
veloso said:
I bought a MHL Adapter (microUSB - HDMI) from DealExterme [1].
It works well, even without power, but when I put the original charger (2A), the S4 starts charging but can't even hold the charge. The charge will slowly dropping over time.
Is this normal?
[1] MHL to HDMI Adapter Cable for Samsung Galaxy S3 i9300 / S4 i9500 / Note II N7100 - Red + Black ($9.40)
dx.com/p/217340
Click to expand...
Click to collapse
Firstly, I don't have an S4, but I do have a Note 2 which also comes with a 2A charger. In my experience when using an MHL adapter the phone will only charge very slowly at best. If you are making it work hard, the battery will slowly drain. If I understand correctly, this is because of a limitation regarding how much power a normal USB port can supply.
When your phone is connected to a wall charger, go into settings and 'more' and tap 'battery'. At the top it should tell you it's charging, and that the type is A/C. Now plug in your MHL adapter, and plug the charger into the MHL adapter and go back into the same settings page - on my Note 2 (and also my HTC Sensation), this page now shows 'USB' instead of A/C. If the same is true with the S4 (and I'm pretty sure it will be), this is the source of the problem. It wouldn't matter if the charger was 1A, 2A or even more, the phone will only draw so much from what it thinks is a USB port. It's a pain, but there you go.
When you connect your phone to a TV via MHL, try lowering the screen brightness on the phone to minimum manually. If you have a quick search, there's also an app on here that should allow you to power of the S4's screen completely and still allow you to output a picture to the TV. Sorry, I don't have the link to hand.
Its the cable. The MHL cable is just a poor cable, if it says USB like Ouzo says then you would need to short the data pins on it or use a charge only cable (the charge only cable may not even work though).
DarkStarr said:
Its the cable. The MHL cable is just a poor cable, if it says USB like Ouzo says then you would need to short the data pins on it or use a charge only cable (the charge only cable may not even work though).
Click to expand...
Click to collapse
I get the part that my MHL adapter might be delivering energy in "USB mode" instead of "AC mode".
My big question is: by the report of "big samm", it seems that the original Samsung MHL adapter does not suffer from this problem. Ie: it delivers energy in "AC mode". Is this true? I can trust and spend $ 40 on it?
If anyone can confirm, I appreciate!
I would just go for a real one from samsung so that way you won't have any problems with the battery charging because it's designed to charge + play
DarkStarr said:
Its the cable. The MHL cable is just a poor cable.
Click to expand...
Click to collapse
Dennelly said:
I would just go for a real one from samsung so that way you won't have any problems with the battery charging because it's designed to charge + play
Click to expand...
Click to collapse
The problem is that I still don't have a confirmation whether in fact the original MHL Adapter solves this problem and the investment is very high (4x the price I paid for the alternate adapter).
I dont know if it's really "designed to charge + play."
Ouzo said:
there's also an app on here that should allow you to power of the S4's screen completely and still allow you to output a picture to the TV.
Click to expand...
Click to collapse
The app is Screen Standby. It freezes and closes when the wizard asks to verify root + busybox. Ignoring this part of the wizard it works but when it make phone screen black all my touches start to have a delay of 8s. Any movement on the screen takes 8 seconds to be played on TV. Totally buggy.
Quick Test
I did a quick test here (without "Standby Screen" app):
Device: S4 I9505
ROM: PAC-man 4.3
Battery before: 17%
TV: Samsung 40F6400 @ 1920x1080 / 30p
Adapter: "MHL to HDMI Adapter Cable" from DealExtreme
Charger: Original Samsung 2A (from S4)
USB cable: Original Samsung White
Charging mode: "USB"
Player: MX Player with H/W+ decoder
Video: Medabots S01E21 480p x264 (20 minutes)
Brightness: minimum
Wi-Fi: ON
Battery after: 13% (-4%)
Estimative: 12%/hour drain
veloso said:
The app is Screen Standby. It freezes and closes when the wizard asks to verify root + busybox. Ignoring this part of the wizard it works but when it make phone screen black all my touches start to have a delay of 8s. Any movement on the screen takes 8 seconds to be played on TV. Totally buggy.
Click to expand...
Click to collapse
Ah, ok, I control my phone with a Bluetooth keyboard with built in mouse (works very well for many things, but not games designed for touch input, though there is an app to help with this in the Play store), I didn't realise you'd still want to touch the screen.
Maybe someone with a genuine Samsung MHL adapter can tell us what the battery screen shows when theirs
is in use with the Samsung charger attached. Also, you could ask nztechfreak, he knows all about such things....
Ok i just checked the manual again and it says " Use only Samsung approved chargers (over1a) there you go...
Sent from my Nexus 4
This is simply beyond ridiculous.
First, let me clarify for couple people that barged in here. This problem has nothing to do with official/unofficial stuff.
I have genuine Samsung Galaxy S4, I have genuine samsung mhl 2.0 adapter, and I have genuine wall charger (2000 mA) as well as the usb cable. You can't go more official than that.
And EVEN with all that, the battery is being drained quickly, despite the mhl adapter being connected with the wall charger. This is simply beyond belief. OBVIOUSLY the phone will be on high usage when the mhl adapter is being connected, because it's the whole point, so did Samsung actually took care of the bigger battery drainage at this point, in connection with charging current? Nope.
You cannot go couple hours before the phone is dead, despite being "in charge mode". The customer uses official samsung stuff, it connects the charging cable, and yet the phone is not charging (just the drainage is slower).
If I met this Samsung CEO that is the first one on the stage to present the cashing cow everytime new galaxy is being presented (well if that's the case he is the first one to ask about his product ain't that correct?), I would ask him about this and would keep nagging this problem to him until his ears would bleed, and he would promise it will be fixed in the next update of mhl 2.0 adapter.
And just to make it clear, the problem is not with the battery drainage, but with the current being suplied from the mhl adapter. If it was 2000 mA, as it is when you connect the phone directly to the wall charger, there would be no problem. Instead it is 500 mA, as it is when you connect the phone to USB port, and because of that, the phone is dead in the manner of hours, despite "charging" (pun intended).
Amazing.
i tested i9505 with his original wall charger.
Original charger with original usb cable consumption is 1200mah
Original charger with other usb cable consumption is 460 mah
So first is important to use original usb cable.
Then i tested compatible mhl cable with original charger, its consumption is 300mah.
So the problem is the slow charging even with kernel with fast charging.
I ordered original mhl adapter, i will test it when come and post result
I'm late to the show, but will report my experience as well.
Last month on stock TW MDK using all genuine Samsung including a MHL 2.0 adapter, I also experienced battery depletion and a hot phone. I failed to check the Status to see whether it was charging at APC or USB rate.
I attributed it to the screen being on and the phone streaming movie data across the cell network.
Just now, I plugged the MHL 2.0 adapter in, then the charger, but not into HDMI. It shows USB for two seconds then it says AC on the phone Status. Same thing a couple times in a row. Plugging the charger directly into the phone goes immediately to AC charging.
--OctOS Powered VZW GS4 Dev Edition
The battery pages says "USB" instead of "AC" when the charger is connected which makes charging very slowly
The problem exists after upgrading to 4.4.2
Is there any solution?
leung991085 said:
The battery pages says "USB" instead of "AC" when the charger is connected which makes charging very slowly
The problem exists after upgrading to 4.4.2
Is there any solution?
Click to expand...
Click to collapse
Have you tried another charger?
leung991085 said:
The battery pages says "USB" instead of "AC" when the charger is connected which makes charging very slowly
The problem exists after upgrading to 4.4.2
Is there any solution?
Click to expand...
Click to collapse
From my understanding the difference of USB and AC charging is the Amps that runs into your phone. I'm not sure what you mean by 'charger' as for me I also use an external charger like a backup battery. If you are referring to a wall charger then you may want to try another charger as this may mean that that charger isn't providing enough Amps to your phone. If you are using a external battery to charge your phone then I would think it's because of that particular external charger. Some only charge at 1A--mine charges at 2.2A--which may trigger a USB charge.
Haha, look, I'm NOT a pro. Nowhere near even. Just chucking in my 2 cents for the purpose of experimentation.
Android determines that you're on an A/C charger by the USB data pins being shorted together. If they're not, or if they're missing entirely, as is the case with a lot of "charge only" cables, then it will only charge in USB mode.
For A/C mode, you need an android compatible charger, and a data cable (not a charge-only cable).
leung991085 said:
The battery pages says "USB" instead of "AC" when the charger is connected which makes charging very slowly
The problem exists after upgrading to 4.4.2
Is there any solution?
Click to expand...
Click to collapse
Same problem someone face in Note3 forum, it was a loose contact, remove cable from plug & put it back & try.
Thank you all very much
I've tried another USB cable and it works again:laugh:
Hello,
Guyz can you tell me why i am getting like 30%Battery in 8h of charging?
My Tablet is like 4 years old im using the gnabo Rom with its standart kernel.
But sometimes it charges normaly?
Does anyone have an Idea?
Usual .
Battery on its way out .
USB cable or port faulty .
Charger faulty .
I Did a research. And i turned off my WiFi while charging and it charges normally now!
Through trial and error, I have found a way to speed up charging and use tablet at same time by purchasing a 2 amp charger, new generic Samsung n8000/n8010/n8103 usb long cable, more importantly a pisen for galaxy usb converter. Also, this converter is useful for charging with external battery pack.
All items are available on eBay or Amazon.