How to charge quick

[Laura]

14? are you using the tablet while charging?

if you leave it alone it should take about 5 hours with a 2A charger.

[Pascal Zinken]

No i am not using it. It automatically starts up when i plug it in. I let it boot into android and leave it alone.

[Laura]

then i guess it’s a charger problem. are you using a quality charger?

[Pascal Zinken]

I used 3 different ones…a samsung charger and 2 other ones. What charger are u using ?

[Pascal Zinken]

And i used different cables

[Laura]

i am using this one http://www.amazon.it/Caricatore-Anker-certificato-Qualcomm-Samsung/dp/B007E6K1NE/ref=sr_1_2?ie=UTF8&qid=1461408560&sr=8-2&keywords=anker+usb+18w

the tablet draws about 1.8A when charging

[Pascal Zinken]

Thnx for your reply.

Does you decice startup also when plugging in by the way ? Is that normal

[dlink377]

For my case I must boot either Windows or Android (Windows is a bit faster), connect the charger, and let it sleep.

You should use high quality charger and cable. I used a cheap cable and it is only charging 0.5A, using charger and cable that comes with my Xiaomi it charges at 2.25A.

It seems my tablet never start when plugged in, but it is quite a bit time since I connect it from cold, I might be forget.

[Pascal Zinken]

Thnx for reply.

The cable i use is the stock one from my samsung device. I tried several ampere apps to measure. .none of them show charging above 1000 mah in spite of that the charger is 2000mah. So i think i have to get a decent cable.

 

How do i know i buy a decent cable ?

[Laura]

i use galaxy s4 cable and it charges fine.

anyway, yes, it does power on when you connect it to the charger

[Pascal Zinken]

dlink377 wrote:

For my case I must boot either Windows or Android (Windows is a bit faster), connect the charger, and let it sleep. You should use high quality charger and cable. I used a cheap cable and it is only charging 0.5A, using charger and cable that comes with my Xiaomi it charges at 2.25A. It seems my tablet never start when plugged in, but it is quite a bit time since I connect it from cold, I might be forget.

 

Which app do u use to test the charge amount ?

[dlink377]

Pascal Zinken wrote:

Which app do u use to test the charge amount ?

I use this small hardware USB power meter:

https://www.adafruit.com/product/1852

[Martin Gorbush]

I have noticed that charging current is propably dependant from supplied voltage. When I use the same USB cable but with two different charger I get less power through with one which has higher max amperage. I was baffled by that result till I noticed that smaller USB charger supply a little higher voltage (5.1V) than bigger charger which at 0.6A has output voltage as low as 4.95V. Even if it isn’t drastic difference it looks like that long cable with thin wires or low supply voltage is primary suspect for long charging times.

Can anyone possessing USB multimeter answer me what voltage theirs charger is achieving at what amperage?

[Laura]

mine has about 5.25v and the tablet sucks about 1.8A out of it

[jetfin]

It would be worth noting here that aside from the actual charger the most important factor is the usb cable itself, specifically the AWG (wire guage) of the power lead in the usb cable you are using. Most usb cables have a 28 awg power line and no matter what charger you have you will not get more than around 500mah to the device. A cable with a 24 awg power wire will be able to handle 2 amps and this is really what you want.

Second thing to note is that the cable length absolutely affects the amps the device can draw. The longer the cable the less amps will end up at the device. A 0.5 meter cable with 24 awg power line will be able to draw more amps to the device than a 3 meter cable with the same gauge.

I’ve got a list of other priorities for this device and stupid realities because of my day job but I will try to do some detailed testing and post back here.

Main thing is that you need to make sure that your charger is at least 2A and your cable has the power wire gauge (24awg minimum) to support it. Stick with a shorter cable, the shorter the better. Unfortunately 99.9% of cable manufacturers don’t publish these specs so it will take some digging…

At the end of the day the device itself decides how many amps it will accept from the charger, and this is possible to change if you have root access. But keep in mind that changing these thing is dangerous and I would not recommend. At the very least, changing settings to speed up your battery charging will decrease the overall battery life…

 

Cube iWork 10 Ultimate Android hacking & development discussion: http://forum.xda-developers.com/t/iwork-10

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