I have that less voltage means less heat but needs thicker and shorter cables to have the same charging speed.
Huawei phones charge at only 4 volts but 5 A? And some phones charge at 12V but only 1A or 2A?
Can anyone explain the differences?
Thanks.
Hi! Take a moment before posting to read the sections description, you'll have better luck reaching your target audience when you post in the correct section.
I'll move this to Questions and Answers, since it does not pertain to xda. :good:
MarcusNow said:
I have that less voltage means less heat but needs thicker and shorter cables to have the same charging speed...
Click to expand...
Click to collapse
This is a challenge to explain but, the following link is a very good one regarding this topic expanded a bit.
https://www.howtogeek.com/175734/htg-explains-can-you-use-any-charger-with-any-device/
I hope that it explains it a bit better for you...
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Being the DIY kind of guy, I'm wondering if anyone tried to disassemble the Touchstone charger and post a schematic so that anyone with some electronics skills can make their own, in whatever shape or colour they desire.
Just wondering.
Ifixit has a pre touchstone tear down. They are similar, maybe you can request that site complete one on the TouchPad version.
I just looked mine over, there are no exposed screws. Any screws must be under the rubber foot, or the back may snap off. I'm not risking breaking mine. But, for $40 you could find out yourself
Sent from my Galaxy S II (i777)
All you need is a USB source with an output of 5.3V and 2A. But on that note, doesn't the higher level of amps charging the TP batteries more quickly kill the overall battery life of the batteries?
I use other brands of usb chargers unless i'm in a hurry, because the TP official charger will get it all juiced up in no time. Lower amperage, slower charging, longer overall battery life (i presume.)
teddyspaghetti said:
All you need is a USB source with an output of 5.3V and 2A. But on that note, doesn't the higher level of amps charging the TP batteries more quickly kill the overall battery life of the batteries?
I use other brands of usb chargers unless i'm in a hurry, because the TP official charger will get it all juiced up in no time. Lower amperage, slower charging, longer overall battery life (i presume.)
Click to expand...
Click to collapse
Not sure about the truth of that, because I think it has something to do with the actual cycles. I'm not 100% sure so if I'm wrong someone correct me.
The OP was referring to the wireless induction charging in the Touchstone, not just a generic USB charger.
As to the whole more amps = lower health battery debate, I won't touch that. I've seen "proof" both ways. What I know is the OEM charger is 5.3v at 2 amps. I am going to trust HP that is the proper specs. Plus, any "smart" device doesn't pull more amperage than it needs, so its software controlled.
Sent from my Galaxy S II (i777)
Indeed, I am not talking about the wired charger, I am talking about the wireless Touchstone charger.
50 USD wouldn't be a problem for a Touchstone. However HP hasn't brought Touchpad's or accessories in Romania and offer no support for them, and I don't want to wait for 2 weeks for delivery.
And I also am the DIY kind of guy, and in the near future I'll be designing and building a custom desk which I would like to include a nice built-in stand for the Touchpad.
teddyspaghetti said:
All you need is a USB source with an output of 5.3V and 2A. But on that note, doesn't the higher level of amps charging the TP batteries more quickly kill the overall battery life of the batteries?
I use other brands of usb chargers unless i'm in a hurry, because the TP official charger will get it all juiced up in no time. Lower amperage, slower charging, longer overall battery life (i presume.)
Click to expand...
Click to collapse
Any old 5.3v/2A source will not give 2A to the TP. The device relies on switch signaling on the data lines which aknowledges that it is connected to the correct (ie HP barrel) charger and this allows the full charge rate to be applied.
In all other cases the charger only gives a low level trickle charge with the resulting longer charge times.
LiPo batteries and their charging profiles are very efficient and are perfectly capable of handling higher charging currents without detriment.
If they become very drained these higher currents are required to start the charge cycle whereas lower power chargers would not.
This thread is not about charge current or cycles, not sure why you haven't gotten a real answer yet, so I decided to register to give you one.
Even if you had the schematics and a source for the components, winding the coil for the inductive charging would be your biggest issue. At best it probably wouldn't be efficient enough to be worth it and it would likely take a long time to charge if it did at all. All the parts and work it would take for a kind of crappy result wouldn't be as good as just spending the $50 or whatever.
That's the negative side though, so don't get me wrong. If I could I'd totally be building one myself as well. I wish more people were into DIY stuff like this. I also really like the idea of building it into a desk and you may be able to do that with an official Touchstone charger.
FjarrKontroll said:
This thread is not about charge current or cycles, not sure why you haven't gotten a real answer yet, so I decided to register to give you one.
Even if you had the schematics and a source for the components, winding the coil for the inductive charging would be your biggest issue. At best it probably wouldn't be efficient enough to be worth it and it would likely take a long time to charge if it did at all. All the parts and work it would take for a kind of crappy result wouldn't be as good as just spending the $50 or whatever.
That's the negative side though, so don't get me wrong. If I could I'd totally be building one myself as well. I wish more people were into DIY stuff like this. I also really like the idea of building it into a desk and you may be able to do that with an official Touchstone charger.
Click to expand...
Click to collapse
While the OP was not about charge current or cycles I do sincerely hope that you understand the value of correcting misinformation and wrong assertions about any aspect that may raise it's related head in these threads.
To jump into a thread and the forum with such a comment is perhaps an indication of the levels of accepable politeness at large in the world today.
But I for one don't take too kindly to it.
But then us 'older' members may be a little too sensitive.
Any impropriety and the mods will deal with it!
I've always been curious if anyone has ever created an app to test the mains power input to the phone. Or even if handsets have that capacity. So if the mains is outputting 240v into my charger can I test what the voltage is that's actually being output but the charger.
Basically I have a couple of chargers using Usb micro 2.0 or whatever it is, the one the Xperia Z uses. They are all unbranded and don't have any markings on such as the output voltage and hertz. So i want to find their output.
Any ideas?
And yes I can use a multimeter I know.
Kirkymole said:
I've always been curious if anyone has ever created an app to test the mains power input to the phone. Or even if handsets have that capacity. So if the mains is outputting 240v into my charger can I test what the voltage is that's actually being output but the charger.
Basically I have a couple of chargers using Usb micro 2.0 or whatever it is, the one the Xperia Z uses. They are all unbranded and don't have any markings on such as the output voltage and hertz. So i want to find their output.
Any ideas?
And yes I can use a multimeter I know.
Click to expand...
Click to collapse
You can try find on Google Play.
Just as a multi meter is the best way to get your answer, posting questions in the q&a forum and not in general is the best way to get answers to any of your questions. I have asked a moderator to move this thread for you. GL with your query.
sent from my T.A.R.T.I.S
(Time And Relative Tarts In Space)
Hi has anyone tried the 2013 charger for nex 7 on nex 5? I am mainly askng because the nex 7 charger output 5.2V @ 1.25A. I am not sure if the increase 0.2V would damage the battery
rudyzhou2 said:
Hi has anyone tried the 2013 charger for nex 7 on nex 5? I am mainly askng because the nex 7 charger output 5.2V @ 1.25A. I am not sure if the increase 0.2V would damage the battery
Click to expand...
Click to collapse
i tried it and seems to be ok for me
Works fine for me too but I am having some concerns that it may harm the battery in the long term. I know chargers with too high a voltage will burn out the device, but I don't know if .2 amps is that big a difference. However, from the general consensus I have seen so far, it is recommended to stay at the same voltage and use the device's original charger.
Can anyone with some electrical background chime in with this situation?
sierratango88 said:
Works fine for me too but I am having some concerns that it may harm the battery in the long term. I know chargers with too high a voltage will burn out the device, but I don't know if .2 amps is that big a difference. However, from the general consensus I have seen so far, it is recommended to stay at the same voltage and use the device's original charger.
Can anyone with some electrical background chime in with this situation?
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Click to collapse
The device limits what it takes so the only real danger is the usb connection burning out and most should be fine.
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rootSU said:
The device limits what it takes so the only real danger is the usb connection burning out and most should be fine.
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Thanks for the quick reply.
I have heard that the device does indeed limit what it takes in, but people were usually referencing amperage, not voltage. Is it still safe to assume that .2 amps is a negligible difference?
Edit:
Here is some additional discussion for those interested: http://w3.reddit.com/r/Nexus7/comments/1nng7y/charging_my_phone_with_my_nexus_charger/
It is in this case.
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hi.
is there a way to detect if my phone is charging at 1.2A, at 1A or at 900mAh, or at 500mAh?
android says me if it is charging via USB mode or via AC mode or via Wireless mode but it doesn't tell me how fast is charging.
if at 1.0A or 1.2A for example.
is there a way to detect this info?
I've been looking today but not found anything accurate yet
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Does anyone know of there's a way of querying this information from the command line? If so, it'd be easy enough to write a little app (depending on permission levels it may or may not require root) that would make the query and display it and even have a notification and/or toast option.
I use an app called Elixir 2, its free and will show you the batter charge along with a lot of other info -- > https://play.google.com/store/apps/details?id=com.bartat.android.elixir&hl=en
jackpollard said:
I use an app called Elixir 2, its free and will show you the batter charge along with a lot of other info -- > https://play.google.com/store/apps/details?id=com.bartat.android.elixir&hl=en
Click to expand...
Click to collapse
I know elixir and I like it but it doesn't give me the information I am asking for.
jefftheworld said:
Does anyone know of there's a way of querying this information from the command line?
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I've been looking around /sys/class/power_supply but found nothing yet.
I think they've changed where this is stored for n5 /kitkat
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sblantipodi said:
I know elixir and I like it but it doesn't give me the information I am asking for.
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Click to collapse
Opps sorry, I thought you were looking for something else.
CurrentWidget and BatteryWidget seems to be giving some sort of mAH reading..
https://play.google.com/store/apps/details?id=ccc71.bmw
EarlZ said:
CurrentWidget and BatteryWidget seems to be giving some sort of mAH reading..
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They don't represent what's being taken in though. More like what's being used
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rootSU said:
They don't represent what's being taken in though. More like what's being used
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Try plugging a charger in and it will show you the current charged amount, with out a charger it shows how much is getting used.
EarlZ said:
Try plugging a charger in and it will show you the current charged amount, with out a charger it shows how much is getting used.
Click to expand...
Click to collapse
Actually no, it will show you the differential between what is being used and what is being charged, which would be a negative or positive number. That's not what we're looking for. We want the charging only
If you want to find what we're looking for, an app should be showing us something like this:
Usb 2: 475-500mA
Usb 3: 875-900mA
AC: 1200mA
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If you cat /sys/class/power_supply/battery/uevent the value next to POWER_SUPPLY_CURRENT_NOW seems to be random. Whether plugged in or not it gives me a random signed number (positive or negative). This _could_ be a differential but on my Nexus S this returned input current, so I don't believe that's what it is.
That makes me think that google has done some shifting around of the function as clearly even their own composite functions don't return correct values.
Sorry, I dont get it.
When plugged into the wall outlet it shows me a reading of 1100mAH, plugged into my power bank it shows me between 600-700mAH..
The Galaxy charging app on the note2 which shows me 1699mAH as my charge rate while the app I mentioned above shows me 1500+
To me that is already a charge rate indicator.
Keep us posted if you find something, id be interested on it too so I can check how much a power bank actually charges before deciding to get a new one. I've been testing a few ones and alot of them only show a charge rate of 200-300mAH aside from the one I have at 600-700mAH
jefftheworld said:
If you cat /sys/class/power_supply/battery/uevent the value next to POWER_SUPPLY_CURRENT_NOW seems to be random. Whether plugged in or not it gives me a random signed number (positive or negative). This _could_ be a differential but on my Nexus S this returned input current, so I don't believe that's what it is.
That makes me think that google has done some shifting around of the function as clearly even their own composite functions don't return correct values.
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This is my feeling too
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---------- Post added at 11:31 AM ---------- Previous post was at 11:25 AM ----------
EarlZ said:
Sorry, I dont get it.
When plugged into the wall outlet it shows me a reading of 1100mAH, plugged into my power bank it shows me between 600-700mAH..
The Galaxy charging app on the note2 which shows me 1699mAH as my charge rate while the app I mentioned above shows me 1500+
To me that is already a charge rate indicator.
Keep us posted if you find something, id be interested on it too so I can check how much a power bank actually charges before deciding to get a new one. I've been testing a few ones and alot of them only show a charge rate of 200-300mAH aside from the one I have at 600-700mAH
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Do you have a nexus 5 specifically?
Galaxy charging app doesn't give me any useful result unlike on my s3.
Current Widget fluctuates massively between 100 and 600mA when NOT charging. When I plug a charger in, it fluctuates between a number that appears to be what the source provides minus the above fluctuating number.
Eg I plug my 1200mA wall plug, my numbers fluctuate between about 1100 and 500mA. I have it to.update every second and every second is massively software.
Perhaps my usb cable is "unstable" if you're getting the correct readings however all the usual locations of charge current in /sys/class/power_ supply no longer seem to contain the info
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my phone not charging, (showing "quick charge" but not charging at all, I keep trying like x50 times to get it charged not sure what is wrong charger or device! ( i tried another type c) same!
and I noticed hard to get 120w charge Max turbo, (only quick charging)
How to know whats the problem!!
also if i use another 100W charger or 80W whatever, it will be charge quick? or charging faster only with official cable/charger!
thank you
U have a defect unit or charger. Send it back
Are you from the US by any chance? Using those 100-something volt power sockets? I've seen numerous reports of those not being able to deliver enough power to the charger.
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fw85 said:
Are you from the US by any chance? Using those 100-something volt power sockets? I've seen numerous reports of those not being able to deliver enough power to the charger.
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Click to collapse
No I am not from the US, but my phone not charging at 120W fast charge for 2weeks with official charger...
brainohyeah said:
No I am not from the US, but my phone not charging at 120W fast charge for 2weeks with official charger...
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Click to collapse
I have the same issue. I've already posted it on the other thread.
Only quick charge with the original brick and original cable. No 120W MAX logo when charging.
I am from denmark. We have 230V here.
I dont know what to do. Is there anybody from EU that has no problems with 120W MAX charging?