Is this possible? TIA
i agree. Possible? ( probably not with the propitory charging plug) thanks for asking though
As said before, no.
no
USB can't provide the power needed. This device is a cell phone size components inside.with huge batteries to power the display.yes I have had my tab apart..
Sorry
The batteries in it are too high voltage and require too much current. If you want to torture your device you could make a 5v to 12v dc->dc converter that would give around 200mA (depending on efficiency) but the charger for it gives 1.5A so even if it did work, you wouldn't be able to charge the device, just increase how long it runs on battery.
Err... but that's probably getting into WAY too much detail.
Not possible is the easy answer.
loialotter said:
The batteries in it are too high voltage and require too much current. If you want to torture your device you could make a 5v to 12v dc->dc converter that would give around 200mA (depending on efficiency) but the charger for it gives 1.5A so even if it did work, you wouldn't be able to charge the device, just increase how long it runs on battery.
Err... but that's probably getting into WAY too much detail.
Not possible is the easy answer.
Click to expand...
Click to collapse
Just a no works well most of the time giggles
I also noticed the only way to charge is the included power supply, I didn't check that at all, what's the output of that power supply? Anyone knows?
loialotter said:
The batteries in it are too high voltage and require too much current. If you want to torture your device you could make a 5v to 12v dc->dc converter that would give around 200mA (depending on efficiency) but the charger for it gives 1.5A so even if it did work, you wouldn't be able to charge the device, just increase how long it runs on battery.
Err... but that's probably getting into WAY too much detail.
Not possible is the easy answer.
Click to expand...
Click to collapse
Even if one did such as you stated and used a converter that supplied 12v @ 1.5A (which they do make) spliced to a mini usb fitting....I think the risk of destroying the device or doing nothing is more than a possibilty. I could be wrong, but the mini USB port supplies output power like the USB 2.0 port. So I can only assume that diodes or whatever precautions manufactured will prevent input power. Just as headphones out will always be output and nothing used can change it otherwise, unless internal changes are made.
At any rate, not possible is the only answer.
Hi all,
Ok, so I finally managed to order a 16Gb Nexus 4 and hopefully it will be with me in 1 week or so.
And I was wondering one thing regarding the AC adapter: I believe (pls correct me if I am wrong) that the original AC adapter’s output voltage is DC 5V, 1.2A.
I will need an extra AC adapter to keep it at work and I was planning to use one of those:
- The Sony Xperia P AC adapter will output 5V, 1,5A
- The Samsung Galaxy S AC adapter will output 5V, 0,7A
It is clear that neither of those 2 chargers will match exactly the specifications of the original Nexus charger (same voltage, but different amperage).
So, here goes the questions:
1) Is there any problem if I use a charger that will output the same voltage but with different amperage?... if not, which one would you use and why?.
2) how the amperage affect to the charging process?.
Thanks all in advance
PS: sorry for terrible English
You can use any charger up to 2 amps.
Sent from my Nexus 4 using xda app-developers app
Evergreen74 said:
Hi all,
Ok, so I finally managed to order a 16Gb Nexus 4 and hopefully it will be with me in 1 week or so.
And I was wondering one thing regarding the AC adapter: I believe (pls correct me if I am wrong) that the original AC adapter’s output voltage is DC 5V, 1.2A.
I will need an extra AC adapter to keep it at work and I was planning to use one of those:
- The Sony Xperia P AC adapter will output 5V, 1,5A
- The Samsung Galaxy S AC adapter will output 5V, 0,7A
It is clear that neither of those 2 chargers will match exactly the specifications of the original Nexus charger (same voltage, but different amperage).
So, here goes the questions:
1) Is there any problem if I use a charger that will output the same voltage but with different amperage?... if not, which one would you use and why?.
2) how the amperage affect to the charging process?.
Thanks all in advance
PS: sorry for terrible English
Click to expand...
Click to collapse
You must use a 5V AC USB Adapter and better no LESS than 1A
for Fast Charge.
AC Adapter I Use:
iPad AC Adapter 5V 2.1A at Work
PlayBook AC Adapter 5V 1.8A at Home 1
Original Nexus 4 AC 5V 1.2A at Home 2.
Our Nexus 4 will Draw around 0.8A when Batt lever at 0% - 80%,
then around 0.5A at 80%-95%, Final State 95%-100% will draw 0.2A roughly.
When 100%, Nexus 4 will use the AC power & the Current "A" show on phone
will like 2mA (0.002A) when idling.
** 1A = 1000mA
As previous poster said, do not go under 1.2amp.
I run the OEM charger in my bed room, a USB charger to my computer, and a 2.1amp charger in the car.
Sfkn2 said:
As previous poster said, do not go under 1.2amp.
I run the OEM charger in my bed room, a USB charger to my computer, and a 2.1amp charger in the car.
Click to expand...
Click to collapse
Why do you say not to go under 1.2A? Charging from a laptop is at .5A. I've been using a 1A charger since day one. Haven't experienced any issues with it.
Charging at a lower amperage shouldn't hurt anything, just charge slower. All you have to do is make sure it's a 5V charger. Amperage shouldn't matter but a lower amp charger will charge slower. As for a higher amp charger, the phone will only draw the amount of power it needs to charge so using 2A charger won't hurt anything either.
Also 2mA is 0.002A not 0.02 A
wilsonlam97 said:
You can use any charger up to 2 amps.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Since the charger doesn't actually regulate the charging itself (the phone does this) it doesn't matter how many amps it can supply, could be 100 amps, no worries. As long as it is 5V, the phone will draw as many amps as it needs.
Since the supplied charger is 1.2A rated, it's fair to assume that the phone will never actually try to draw any more than that, so there will be no benefit in going higher.
Going for a lower current charger will likely extend the charge time.
I use a 2.1 amp daily without any issues.
Sent from my Nexus 4 using Tapatalk 2
Wow guys!!... thanks all for your answers!!
So, if I understood correctly, the amperage will only affect to the charging time, meaning that by using the Xperia P AC adapter (1,5A) the battery will be charged faster that using the Galaxy S one (0,7A)... right?
Pls allow one last question: a few yeard ago, I think I read in some forums that a slower charging process could help to keep the batteries in the best conditions for a longer time... is this still true with modern batteries??
Again, THANKS all for your help!!
Evergreen74 said:
Wow guys!!... thanks all for your answers!!
So, if I understood correctly, the amperage will only affect to the charging time, meaning that by using the Xperia P AC adapter (1,5A) the battery will be charged faster that using the Galaxy S one (0,7A)... right?
Pls allow one last question: a few yeard ago, I think I read in some forums that a slower charging process could help to keep the batteries in the best conditions for a longer time... is this still true with modern batteries??
Again, THANKS all for your help!!
Click to expand...
Click to collapse
Yes, the .7A charger will take a little longer to charge you phone.
On the other answer, I think NO but I'm not as familiar with LiPo batteries. I would venture to say that .7A vs 1.2A (max the phone will draw but I think someone above mentioned it's even less than that when the battery is very low) is not going to make a bit of difference in your battery life.
One thing I do know about LiPo's is you do not trickle charge them. So while plugged in it will charge at the rates mentioned above until full and then it QUITS charging all together. Once the phone discharges the battery to a certain level, it will charge it back up again. Probably at 98-99%.
There may be one other thing to consider when selecting a third party charger. In the Nexus 7, the device looks for pins 2 & 3 (data) of the USB plug to be shorted in order for it to draw full current. If this pins are open (or have a load across them as is the case with iPhone/iPad chargers), the Nexus 7 will assume it is plugged into a computer and limit its draw to 500MA.
Not certain the Nexus 4 behaves the same way but would assume so.
setzer715 said:
Yes, the .7A charger will take a little longer to charge you phone.
On the other answer, I think NO but I'm not as familiar with LiPo batteries. I would venture to say that .7A vs 1.2A (max the phone will draw but I think someone above mentioned it's even less than that when the battery is very low) is not going to make a bit of difference in your battery life.
One thing I do know about LiPo's is you do not trickle charge them. So while plugged in it will charge at the rates mentioned above until full and then it QUITS charging all together. Once the phone discharges the battery to a certain level, it will charge it back up again. Probably at 98-99%.
Click to expand...
Click to collapse
setzer715, thanks for the answer... I think I will be using the Xperia P charger at work...
Thanks all for your help!!
I want to make this case clear. According to my Charging log,
Here is some key point.
Nexus 4 Max Draw Rate at Fast Charge Mode is around 800-900mA,
even you use a Charger that rated at 1A (iPhone Tofu), 1.2A (Original),
1.8A (Playbook), 2.1A (iPad).
Fast Charge Mode must be with Charging Cable with 2&3 pin Shorted,
or the charger itself have the 2&3 pin already shorted.
Therefore, 1A is a Sweet spot for getting Charger & Charging Time for
Li-Po/Li-Ion/Ni-MH Batt charging.
If you use under 1A Charger, eg 700mA or 500mA, it will take much longer
to charge the batt but no harm as well. Just too slow only.
The stock charger that came with my phone sucks, I use one from my epic 4g touch (gs2)and it charges much better
DEVICE: Nexus 4
KERNEL: Franco r95
ROM: PROJECT Extinct Life Event
jlear3 said:
The stock charger that came with my phone sucks,
Click to expand...
Click to collapse
Why you say so...? What's wrong with it...?
Talon88 said:
Why you say so...? What's wrong with it...?
Click to expand...
Click to collapse
Left a phone on a charger all night with a long (10ft) cable and it couldn't even charge the phone over night. I know a 10ft cable will slow things down but my gs2 plug has no problem charging my phone. Search around and you'll find a few fail stories about the stock LG charger.
Sent from my Nexus 4 using Tapatalk 2
Quick question: can I use the N10 charger to charge my Galaxy nexus? This is the normal USB charger and not the POGO charger. The only reason that I ask is that the end that connects to the wall is significantly bigger on the nexus 10 charger than the galaxy nexus charger. Figured i would ask before I burn anything.
No problem at all.
Just look at the chargers you have.
Voltage will most likely always be 5V. Lower amps can hurt the charger but not the device.
One easy way to look at it is this:
Voltage is provided by (or pushed) by the power supply.
Amperage is taken by (or pulled) by the device being powered.
In other words, while the voltage is a constant and should match, the amperage is something that varies based on the devices need. Your computer will "pull" more amps when it's working hard than when it's not. The voltage will remain the same regardless.
The amperage rating of a power supply is the maximum number of amps that it's able to provide if needed.
Thus, as long as you replace your power supply with one that is capable of providing as much or more amps than the previous supply, you'll be fine.
Of course you can!
I use N10 charger to charge my Nexus S and I haven't problem.
Great! thanks everybody!
Edit: Crap meant to put in Q&A section. Could a mod please move?
I've found a few apps that are supposed to show the amps but everything seems to either always show 1amp or can't read anything and shows 0 amps. I have a kill-a-watt ez P3 but it's showing 0.16 amps being drawn with the three 2 amp rated AC chargers I have, so that doesn't seem to be of use.
Does anyone have any root specific ways to find this more accurately or any suggestions not app specific to figure this out?
Edit: Crap meant to put in Q&A section. Could a mod please move?
reTARDIS said:
Edit: Crap meant to put in Q&A section. Could a mod please move?
I've found a few apps that are supposed to show the amps but everything seems to either always show 1amp or can't read anything and shows 0 amps. I have a kill-a-watt ez P3 but it's showing 0.16 amps being drawn with the three 2 amp rated AC chargers I have, so that doesn't seem to be of use.
Does anyone have any root specific ways to find this more accurately or any suggestions not app specific to figure this out?
Edit: Crap meant to put in Q&A section. Could a mod please move?
Click to expand...
Click to collapse
have a look here http://forums.androidcentral.com/verizon-galaxy-nexus/150632-app-tell-you-your-ma-charging-rate.html
Galaxy charging current.
noideaforusername said:
Galaxy charging current.
Click to expand...
Click to collapse
This works!
Interesting results also.
I'm getting 1.9a with the OEM charger and cable but adding a desktop charging cradle to that will make it so to 460ma
Cables do matter. Non-shielded cannot hit the full 1.9a that a proper shielded cable can.
Not all 2a rated AC chargers seem capable of charging at 1.9a either.
reTARDIS said:
This works!
Interesting results also.
I'm getting 1.9a with the OEM charger and cable but adding a desktop charging cradle to that will make it so to 460ma
Cables do matter. Non-shielded cannot hit the full 1.9a that a proper shielded cable can.
Not all 2a rated AC chargers seem capable of charging at 1.9a either.
Click to expand...
Click to collapse
It might be Samsung who limiting the charging of other cables or AC chargers :silly:
reTARDIS said:
This works!
Interesting results also.
I'm getting 1.9a with the OEM charger and cable but adding a desktop charging cradle to that will make it so to 460ma
Cables do matter. Non-shielded cannot hit the full 1.9a that a proper shielded cable can.
Not all 2a rated AC chargers seem capable of charging at 1.9a either.
Click to expand...
Click to collapse
Samsung uses a voltage divider and signals the presence of their own charger by sending 1.2-1.3 V across the D+ / D- pins, this is similar to what Apple does with 2.0 or 2.8 V across the pins for various USB chargers they've shipped over the years. This signaling is essentially Samsung's proprietary tablet charging signaling which they've employed on the Galaxy Note 2 and now SGS4, in fact the two use the same exact charger, so it's worth tossing out your old ones and getting the appropriate one to take advantage of the faster charging
rubenswing said:
Samsung uses a voltage divider and signals the presence of their own charger by sending 1.2-1.3 V across the D+ / D- pins, this is similar to what Apple does with 2.0 or 2.8 V across the pins for various USB chargers they've shipped over the years. This signaling is essentially Samsung's proprietary tablet charging signaling which they've employed on the Galaxy Note 2 and now SGS4, in fact the two use the same exact charger, so it's worth tossing out your old ones and getting the appropriate one to take advantage of the faster charging
Click to expand...
Click to collapse
My iPad and some $15 brand called "Tech & Go" are both rated at 2.1a and according to Galaxy Charging Current they're charging at the same full 1.9a when using a proper shield cable.
Now my biggest challenge is finding a car charger that can do 1.9a as that's my biggest issue currently. When Google Music All Access streaming and GPS going with the screen on the chargers I've tried so far cannot even keep up with the power drain or just barley keep up. I need the full 1.9a in the car if I ever want to do those functions AND charge my battery up.
Anyone know of a car charger that'll do the 1.9a on the S4?
reTARDIS said:
Anyone know of a car charger that'll do the 1.9a on the S4?
Click to expand...
Click to collapse
Verizon has a dual outlet car charger that says it's 2 amps. The questions I cannot answer about it are:
- Does it give 2A through one USB port, or is it limited to 1A + 1A.
- Will the S4 recognize it and allow itself to draw 2A, or will it treat it like other "unrecognized" chargers and limit draw to 500mA.
is it okay to use a portable battery charger other than a wall outlet (or car battery) to charge my n10? like one of these battery packs?
for example: http://www.staples.ca/en/Aluratek-1...oduct_184717_2-CA_1_20001?externalize=certona
would it cause an damages to my tablet ever? anyone had any bad experiences? the good thing about these is that you dont have to worry about a power outage and your tablet getting bricked or something while charging from a power socket in a wall
can anyone provide any links to a good portable charge that is compatible with the n10?
anyone know if its okay to use one of these battery chargers?
I don't have personal experience with this combo, but it should work as long as you get enough voltage and amps. I rolled my own iphone charger from a battery powered fan and it worked great.
Just make sure you check that tablets are supported, given they need more juice (I think).
anyone?
It will work if you have the good voltage (5V) and enough current you can take.
The nexus 10 wall charger can output 2A but if you have 1A or 500 mA it will also work but the charge will be slower and perhaps you will need to shutdown the tablet to charge.
So prefer a charger with 2A output.
Also there is a thing with the connection inside the charger which tell the tablet how much current it can take over the usb connection (see post http://forum.xda-developers.com/showthread.php?t=2090208), some cable or adapter can do the trick or you can do it yourself if you want ...