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# Charges too slow

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StreamingMT
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Quote:
 I was using some generic cable, not the suplied Sony one, cuz I thought they were all the same.
Not correct, the charge speed is depending the cable used, her inside diameter and the length. And for sure: the power source capacity.

LordManhattan
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Quote:
 Originally Posted by big I changing by magetic cable very sloow, 5h to full!
You're using a "fake" magnetic charger, yes? It shouldn't take more than 2 hours from 0-100% if you're using the original Sony cable.

herogjan
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 Originally Posted by hamdogg Yes devices choose how much current to draw from chargers, up to the amount of current that specific chargers can provide. However, at the same time, aftermarket/ different branded chargers have may have a varied power range, which can damage the device. And I'm sure many of us have experienced them cause damage. i.e Volts are pushed, current is pulled. A 2A power supply does not mean it pushes 2A to whatever it's connected to. All it means is that if it's 2.5V, the minimum resistance you can have in the circuit it's powering is 2.5 Ohms without ruining the power supply from a current that's too high (i.e. higher than 2A). The other formulae for power. One of them is P = V2 / R. Because resistance is fixed in this case, the only way we can get the right power is by having the right voltage (which is also the sole determining factor of how much current is drawn).
When charging a lion, life, lipo battery voltage is a constant. You can't exceed 4.2 volt. Battery will puff and blow up when this is exceeded. I assume there is a protective circuit in the device. It should stop charging when this is exceeded. I think everybody have expeienceda battery that won't charge (laptop, phone, powertool) this is also a device safety. When a cell is below 2.7 its damaged beyond repair. When you force load it, it will explode.

Resistance is a variabel, when the resistance is higher it pulls less amps. Lower more amps, if the charger is able to give.

R= rho l/A (resistance of wire)

P=U x I (power needed for a full load)

When voltage is a constant, resistance is a factor, makes that only altering the current has an effect.

Sent from my A700 using XDA Premium HD app
 kssr 24th October 2013, 04:09 AM Junior Member Thanks Meter 0 Posts: 2 Join Date: Mar 2013 Note2/3 Charger Erica Griffin "The Technology nerd who likes to film stuff" in one of her video reviews on the XZU claims to be using her Note2 charger on her XZU without any problems. I trust her opinions, she's been around for quite some time now and does VERY in depth video reviews on phone tech. She does video reviews for XDA also, so....Trusted source? I think so REPLY

hamdogg
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Quote:
 Originally Posted by herogjan When charging a lion, life, lipo battery voltage is a constant. You can't exceed 4.2 volt. Battery will puff and blow up when this is exceeded. I assume there is a protective circuit in the device. It should stop charging when this is exceeded. I think everybody have expeienceda battery that won't charge (laptop, phone, powertool) this is also a device safety. When a cell is below 2.7 its damaged beyond repair. When you force load it, it will explode. Sent from my A700 using XDA Premium HD app
unfortunately I've had to send my Ultra in for warranty repair/replacement. It was always thinking it was charging, wether plugged in or not. Unless the volt spiked then would stop.. and function normally.. So yes there must be a protective circuit in there, however doesn't stop some kind of damage occurring.. (possibly just a reset function within hardware, not sure...Sony said they will need to look at it)

---------- Post added at 09:16 AM ---------- Previous post was at 09:13 AM ----------

Quote:
 Originally Posted by kssr Erica Griffin "The Technology nerd who likes to film stuff" in one of her video reviews on the XZU claims to be using her Note2 charger on her XZU without any problems. I trust her opinions, she's been around for quite some time now and does VERY in depth video reviews on phone tech. She does video reviews for XDA also, so....Trusted source? I think so
Yeah i've seen a few of her clips. She really does her research, so I would also opt to give her credit.
The best case scenario would be to buy a 3rd party charger that matches the specs of the official Sony 'quick charge'
Then at least you know your safe.. and still saving money.
 hardtheory 25th October 2013, 05:09 PM Member Thanks Meter 16 Posts: 85 Join Date: Apr 2010 i have the impression that since the last update (14.1.B.257), sony as change the way of charging the device. charge fast till 70 %, a little bit slower till 90 % , and slower till 100% . i have calculated the time of charging from 5% to 100% , i took 3 hours. i use the EP880 charger and official data cable. REPLY

LordManhattan
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Quote:
 Originally Posted by hardtheory i have the impression that since the last update (14.1.B.257), sony as change the way of charging the device. charge fast till 70 %, a little bit slower till 90 % , and slower till 100% . i have calculated the time of charging from 5% to 100% , i took 3 hours. i use the EP880 charger and official data cable.
It's the same with Samsung devices, and I bet all other devices. With this, I'll summon @hamegg since he knows stuff about batteries. @hamegg! Show yourself!

Sent from my Z Ultra, using XDA Premium 4

---------- Post added at 09:14 PM ---------- Previous post was at 08:27 PM ----------

OMG, i mean @hamdogg! LOL

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hamdogg
(Last edited by hamdogg; 27th October 2013 at 12:28 AM.)
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 Originally Posted by LordManhattan It's the same with Samsung devices, and I bet all other devices. With this, I'll summon @hamegg since he knows stuff about batteries. @hamegg! Show yourself! Sent from my Z Ultra, using XDA Premium 4 ---------- Post added at 09:14 PM ---------- Previous post was at 08:27 PM ---------- OMG, i mean @hamdogg! LOL Sent from my Z Ultra, using XDA Premium 4
LOL... got notified of a mention, and this 'cracked' me up... (sorry... couldn't resist)

Ok here is the 411 on Lion Batteries...

Consisting of Aluminium (cathode/ + ) at the top and copper (anode / - ) on the bottom and then in the middle are varying qualities of carbon. When the battery charges, ions of (lithium in this case) move through the electrolyte (which separates the positive from the negative) from the positive electrode to the negative electrode and attach to the carbon. During discharge, the lithium ions move back.
Its this carbon that the positively charged ions stick to. The better quality the carbon/ more little nooks and holes in it, the more particles can stick to it, meaning the more you can charge it/ longer it will last.

So this is the mAh rating... i.e our battery is 3050 mAh. The battery is smaller than the note 2 and yet Samsung's battery was 3100mAh. So that must mean the carbon Sony uses is of a better quality.

To answer your questions, the first 80% will charge faster as the little nooks and holes in the carbon are everywhere. But when its almost fully charged, then its harder for these ions to find a place to stick. So thats why it takes longer to charge that last few %.

As for an update of firmware, all that Sony could do here, is change the tolerance of volts, and subsequently the amount of current pull that the device can get. Increase / decrease, depending on how Sony feels it will effect the device.
Hope that helps...

---------- Post added at 01:35 AM ---------- Previous post was at 01:28 AM ----------

Quote:
 Originally Posted by hardtheory i .
I miss my Ultra!

(still talking about my phone here.. )

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