USB 3.0 charging speed

[missdorado26]

I just got th he note 3 and noticed it took forever to charge my phone to 100%. I took it to the store and they said it's normal? How can it be normal to have a new phone take 5+hours to charge. I havent been able to use the cord that came with it bc iforgot it at work but any USB cable should work right?

Posted via Android Central App

 

[VAHE999]

My pc is new....motherboard is asus p8h77-v core i5 3330 processor geforce gtx 570 videocard and 8 gb ram and many many many coolers

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Your pc isn't providing enough power to the USB port. Nothing you can do about it, except charge from the wall or get a new pc.

Posted via Android Central App

My pc is new....motherboard is asus p8h77-v core i5 3330 processor geforce gtx 570 videocard and 8 gb ram and many many many coolers

 

[Zogundar]

This is just my perception based on two instances so far, but it seemed like when I plugged my phone into one of my new computer's USB 3.0 ports, it charged very slowly, whereas when I plugged it into my old computer's front 2.0 ports, it charged noticeably faster.

The phone was a lot lower on power in the first case, if that makes a difference (I think I let it get to 15%.)

 

[Almeuit]

My pc is new....motherboard is asus p8h77-v core i5 3330 processor geforce gtx 570 videocard and 8 gb ram and many many many coolers

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My pc is new....motherboard is asus p8h77-v core i5 3330 processor geforce gtx 570 videocard and 8 gb ram and many many many coolers

The mobo.. RAM.. Video card.. Has nothing to do with the power supply.

Sent from my T-Mobile Note 3 using AC Forums.

 

[anon8126715]

I'm plugged into a USB 2.0 port on my main laptop, and the charge times are outstanding. I haven't noticed much of a difference in plugging into the USB 2.0 vs plugging into my 3.0 (with exception of that annoying, "This device can run much faster....") pop-up.

 

[dpham00]

The mobo.. RAM.. Video card.. Has nothing to do with the power supply.

Sent from my T-Mobile Note 3 using AC Forums.

Even with a 1,000w psu, if you don't have or aren't using a USB 3.0 port, then charging is limited to 500ma,which may not be enough to get a positive charge if the phone is being used.

Sent from my Verizon Samsung Galaxy Note 3 via Tapatalk Pro

 

[VAHE999]

my phone is not being used when i plug it to charge....i plug it in usb 3.0 port and its charging in 500 mah...whyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy???????

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Even with a 1,000w psu, if you don't have or aren't using a USB 3.0 port, then charging is limited to 500ma,which may not be enough to get a positive charge if the phone is being used.

Sent from my Verizon Samsung Galaxy Note 3 via Tapatalk Pro

my phone is not being used when i plug it to charge....i plug it in usb 3.0 port and its charging in 500 mah...whyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy???????

 

[VAHE999]

The mobo.. RAM.. Video card.. Has nothing to do with the power supply.

Sent from my T-Mobile Note 3 using AC Forums.

it's like my power supply is bad??i must bye new power supply?????????

 

[Hokie-Dave]

I'm using and older PC with a USB 2.0 port and a USB Monster Cable charging cord and my phone states it is charging at 1200mah? Is the program wrong if USB 2.0 is supposed to be limited to 500mah?

 

[VAHE999]

What must i do?it's my motherboard problem?or it's my power supply problem

 

[Shaun Boerner]

What must i do?it's my motherboard problem?or it's my power supply problem

I'm sure you've figured it out by now, but if anyone else was wondering. You probably just need to install a driver so your computer knows how to use the 3.0 ports properly. Just Google the usb driver for your computer and it should work.

 

[zacsaturday]

so does the USB 3.0 affect charging speeds

 

[jpr]

so does the USB 3.0 affect charging speeds

Yes, if connected to a USB 3.0 port on a computer. No if connected to an outlet or usb 2.0.

 

[Rukbat]

My Note 3 charges at a maximum current of 1,200mA, regardless of how much current I supply to the USB 3.0 cable. (I have a 25 Amp 5 Volt supply available for testing.) Plugging the same cable into my laptop's USB 2.0 port gives me a 450mA charge rate. Qi (wireless) charging gives me 600 mA.

But the phone will never draw more than it's designed to, no matter how much current you supply. (You supply the 1 Amp [100 Watt) light bulb in your house with about 100 Amps. It still only draws about 1 Amp [half an Amp if your household Voltage is 220 Volts].) What normally sets the charge rate is how much current is available - up to the maximum the phone can draw.

As far as how long it takes to charge the battery,m there are a number of variables, including its past charging history, how deeply it was discharged AND how much current you can supply to the cable. Charging from 40% takes a lot less time than charging from 0% (or, effectively 0% - if the battery ever drops to no charge at all it becomes toxic waste - since charging a totally discharged Lithium battery results in a small bomb, there's a protection circuit that disconnects the battery inside from the terminals on the outside if the voltage ever drops too low). And if the battery has consistently been drained to close to 0 charge, it takes longer to charge than a battery that's normally kept at least half charged and is once being charged from a deep discharge. (You also risk creating dendrites - internal shorts - a lot more if you regularly deep-discharge the battery. They're working on the problem, but no one's come up with a solution yet, because it's difficult to change how chemistry works.)

 

[jpr]

The phone will charge at up to 1800mA if the screen is off with the 2A charger. But the actual answer to to zac's question is the one I gave. Using the 3.0 cable will affect charging speeds when connected to a USB 3.0 port.