Database Users

Extended USB Cable not charging nexus 7

I tried swapping out the USB cable that came with my nexus 7 with a longer usb cable (still using the same charger though edit: by that, i mean the ASUS charger that came with the N7). It doesn't seem to be charging though, even though it says 'charging' on the screen. When i was using the nexus 7 while plugged in, i actually lost 1% charge after using it for like 30 or so minutes.
I think i grabbed this cable off Ebay. It had no trouble charging my phone. Are there different grades of USB cables or something?

By same charger do you mean the one it came with? The 2 amps charger. Sorry I had to clear that bit up. I think longer cables creates more resistence but I'm not sure if the cable length is significant enough stop charging. I have no idea about grades of USB cables though maybe someone can elaborate on that.

Summerfly said:
By same charger do you mean the one it came with? The 2 amps charger. Sorry I had to clear that bit up. I think longer cables creates more resistence but I'm not sure if the cable length is significant enough stop charging. I have no idea about grades of USB cables though maybe someone can elaborate on that.
Click to expand...
Click to collapse
Yes, the ASUS charger it came with, i plugged in the 6 foot microusb cable i bought off ebay into it.

MFister said:
Yes, the ASUS charger it came with, i plugged in the 6 foot microusb cable i bought off ebay into it.
Click to expand...
Click to collapse
Okay, 6 foot cable doesn't sound excessively long. I have to ask what were you doing on it while charging and what brightness setting was the screen at. Maybe you were draining more power than the charger can provide?

This is pretty common. The stock cable has larger conductors, as I assume other 2 amp chargers come with, and standard cables are sensed somehow and charging current is limited. Try finding a 22awg cable, I think it will work.

I use a USB extender since I don't have any outlets near my bed. I use a cable rated for USB 2.0 and haven't had any problems. I have had problems with cables that aren't. The Motorola USB cables are rated for 2.0 and they all work fine for me with no problems.

burpootus said:
This is pretty common. The stock cable has larger conductors, as I assume other 2 amp chargers come with, and standard cables are sensed somehow and charging current is limited. Try finding a 22awg cable, I think it will work.
Click to expand...
Click to collapse
Thanks, i assume this cable that's 28/24 awg would work?
http://www.monoprice.com/products/p...=10303&cs_id=1030307&p_id=8643&seq=1&format=2

I use a cable extender, but I insert the original stock cable into the tablet (not the charger). It appears to recognise that and charge at the correct rate.

I've tried using a usb extender to charge with the asus charger and the Asus USB cable and checking with battery graph it charges much slower compared to using just the Asus cable.

People with eyesight better than mine will see that the micro USB socket has 5 pins and the Nexus looks at the 5th pin to decide what is connected and what the connected device is allowed to do. The pin can be grounded, not connected (floating) or can be connected to ground via I think 3 fixed resistances. Google for USB on the go. I think that is the standard adopted by Asus and the cable doesn't comply.

I'm using a nook 1/2 cable I got with a car charger for the nooktablet
It works and is longer then the stock cable it came with.
Sent from my Nexus 7 using Tapatalk 2

EE here. I just ran into this issue recently, so I'll share what I learned. Grab a multimeter and measure the resistance of the cable. Check all 4 pins just in case one of them is worse than another.
In my case, I had a really horrible USB extension cable. It measured about 4 Ohms. 4 Ohms is low enough for a multimeter to pass a continuity test, but do out the math:
V = I * R
V = 2A * 8 Ohms (4 Ohms on VCC, 4 Ohms back on GND)
V = 16V.
16 volts?? Where does 16V come from? Short answer: It doesn't. If 2A were actually flowing, the USB cable would have a 16V drop across it. It doesn't though, which tells us that 2A is not flowing. 1A is also not flowing, since that would still be 8V.
0.5 Ohms is a good estimate for a MAXIMUM resistance for a USB charging cable. That's a 1V drop at 2A, meaning the phone is only getting ~4V. That explains why the USB cable that comes with the Nexus 7 is so darn short - it comes in at around 0.1 Ohms (or perhaps less, that's about the limit of what I can accurately measure)

Wanted to get a longer USB cable that will work the Asus adapter, any links?
Thanks.

came across this thread while investigating a strange thing in charging my 4400mah extended battery of my s3.
I have a 5v 1A stock samsung charger with an extension cable i was always using to charge my old phones with a less capacity battery (mugen 3200mah)
This night i spent i wasnt ble to get a full charge from 5% to 100% in 8 hours and this sounds more than strange, but yet understandable.
i will try timings with the stock cable without extension and i'll come back...

[Q] micro USB cable?

It's interesting how my old microusb cable slow charges the phone.
Are there different microusb cables with different amp charge?

onetake said:
It's interesting how my old microusb cable slow charges the phone.
Are there different microusb cables with different amp charge?
Click to expand...
Click to collapse
I saw someone mention that there's a pin removed and that's the detection method but I just don't buy it. I am using a standard, off-the-shelf MicroUSB cable plugged into my Nexus7 charger (2a) and it doesn't complain about slow charging at all. I'm not sure if this is anecdotal or not, but I have confirmed that a stock Micro cable + 2a charger will do fast charge.

New type c cable

Anyone know where I can get the new type C cable as it is suppose to charge the OP2 faster? Is it the one on their official OnePlus website?

What do you mean? The OP2 has always used the type C USB cable.

But OP2 doesn't support quick charge and i heard the new cable makes it charger quicker

Never heard of any value that improves charging speeds but you could get adapters (micro usb to usb 3) if you have a better charging adapter. The idea is to supply the battery with more current (not voltage) than what it requires. I wonder if that's one of the reasons why op3 has a 4A charger.
Sent from my ONE A2003 using Tapatalk

OK. Call me crazy cuz I understand that this device does not have the hardware to support fast charging BUT:
I just bought a oneplus 2 from Amazon and I thought that the wall charger's input would also be type c and since I don't have a laptop with a USB type c jack, I figured I should buy a USB type c to type a adapter. So, when I got the device I was surprised to see that the charging cable the device comes with IS type c on one end and type a on the other. This means I never needed the adapter cable to plug the device into my laptop. I had already ordered it tho so I figured I'd take one of my many other wall chargers and use the adapter cable with it to have a second charger at work. Today I plugged the device into that adapter cable AND I used Samsung's quick charger wall charger (the one that cane with an s7 I owned) and I swear that the device charged MUCH faster. It went from 38% to 94% in about 40 min. To me, it seemed faster than the oneplus charger. Could just be in my head but if it was, it was crazy. Here is the adapter cable I ordered from amazon. If you wanna experiment, the cable is only $6. Try it with Samsung's quick charger and see:
Cable Matters USB Type C (USB-C) to Type A (USB-A) Cable in Black 3.3 Feet https://www.amazon.com/dp/B00S8GU2OC/ref=cm_sw_r_em_apa_RdpWxb2GG0SWA
Sent from my A2003 using XDA-Developers mobile app

Essyy786 said:
But OP2 doesn't support quick charge and i heard the new cable makes it charger quicker
Click to expand...
Click to collapse
Only if compared to a broken/defective cable normal charging time must be near two hours
Sent from my ONE A2005 using Tapatalk

Magsafe / Magnetic Charger

Is there one that supports fast charge for the 6p?
I bought one of these but it doesn't fast charge ....
First2savvv Magnetic USB C Cable USB 3.0 USB Type-C Cable (C to A) for the new MacBook, ChromeBook Pixel, Nokia N1 Tablet, Huawei P9 V8 Note 8, Nexus 6P / 5X, LG G5, OnePlus 2, and Other Type-C Devices-CTX-TYPEC-16 https://www.amazon.co.uk/dp/B01N4DTVOG/ref=cm_sw_r_cp_apa_mayAybM520ZDK

Jinson7 said:
Is there one that supports fast charge for the 6p?
I bought one of these but it doesn't fast charge ....
First2savvv Magnetic USB C Cable USB 3.0 USB Type-C Cable (C to A) for the new MacBook, ChromeBook Pixel, Nokia N1 Tablet, Huawei P9 V8 Note 8, Nexus 6P / 5X, LG G5, OnePlus 2, and Other Type-C Devices-CTX-TYPEC-16 https://www.amazon.co.uk/dp/B01N4DTVOG/ref=cm_sw_r_cp_apa_mayAybM520ZDK
Click to expand...
Click to collapse
I don't think you can fast charge a Nexus 6P when connecting it to a computer USB port, if that's what you're trying. Needs to be connected to wall outlet or car cigarette lighter to fast charge.

jhs39 said:
I don't think you can fast charge a Nexus 6P when connecting it to a computer USB port, if that's what you're trying. Needs to be connected to wall outlet or car cigarette lighter to fast charge.
Click to expand...
Click to collapse
No this is to plug into the mains at home. This is just the cable. I have a orzly USB C to A cable that fast charges it with my main charger but this cable doesn't fast charge.

Jinson7 said:
No this is to plug into the mains at home. This is just the cable. I have a orzly USB C to A cable that fast charges it with my main charger but this cable doesn't fast charge.
Click to expand...
Click to collapse
You should contact the manufacturer through Amazon and see what they have to say or just return the cable. The description says it's compatible with the 6P but not specifically that its compatible with fast charging on the 6P. It might be worded that way intentionally.

The seller said it's my plug and not the cable but my plug works with an orzly cable

Jinson7 said:
No this is to plug into the mains at home. This is just the cable. I have a orzly USB C to A cable that fast charges it with my main charger but this cable doesn't fast charge.
Click to expand...
Click to collapse
There are many similar discussions around chargers and cables in the Accessories sub-forum. Basically USBA to USBC cables are not supposed to rapid charge because they are supposed max out at 2.4A. If they do rapid charge (5V/3.0A), they lack the proper resistor and so are not compliant with the USBC standard. You can Google Benson Leung to learn more, but head over to the Accessories forum and look/post there. You may also request a Mod to move this post where you may get more answers to your original question.

Type C to C cable?

Looking for a longer c to c cable that won't inhibit charge speed and preferably braided but not required. Have you guys had any luck finding cables that won't charge slowly?

I bought a baseus 9 ft one, it is braided, does quick charge well, aluminum caps

Apple 2m cable works fine with stock 25W charger.
Sent from my SM-N950U using Tapatalk

monoprice has plenty. good prices too.

I got these and they work fine.
Akoada USB-C to USB-C 100W Cable 10ft,USB C Braided Fast Charging Cable Compatible with 2019/2018 MacBook,MacBook Pro,MacBook Air/iPad Pro 2018,HP Spectre,Pavilion,Pixelbook*and Type-C Laptops (Grey)
https://www.amazon.com/dp/B07V2KNDN2/ref=cm_sw_r_em_apa_i_stKiEbX6P1TT5
Sent from my SM-N975U1 using Tapatalk