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Magnetic POGO Cable

OP jstevenkim

9th January 2013, 05:27 PM   |  #231  
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Quote:
Originally Posted by EDNYLaw

the I=91 was the percent of the battery, I'm assuming "v" was voltage in millivolts and c = current I guess. Perhaps, whomever requested the data actually knows what all the variables mean.

Ah! That's right, my bad.

---------- Post added at 11:22 AM ---------- Previous post was at 11:18 AM ----------

Quote:
Originally Posted by skally

Max current going in to the Nexus I have seen with the Pogo cable is 1960mA. That was with flight mode on, screen off and freshly booted from dead battery.

Max current I have seen the Nexus use is 2930mA. That was running Asphalt 7 on full brightness.

I see there being a deficit of 1Ah, meaning on full brightness, playing a game, it will last 9 hours. Even when plugged in

Is that measured with a meter or using an app?

---------- Post added at 11:27 AM ---------- Previous post was at 11:22 AM ----------

Quote:
Originally Posted by derobert

A quick check of /sys shows that there is a smb347 charge controller, and it's set to 2A max:

~ $ f=/sys/class/power_supply/smb347-mains/current_max ; ls -l "$f"; cat "$f"
-rw-r--r-- 1 root root 4096 Jan 9 10:10 /sys/class/power_supply/smb347-mains/current_max
2000000
~ $

But quickly Googling the part says it can do 2.5A. Not sure why Google/Samsung has limited it to 2A, there may be a good reason. If not, getting another 25% should be doable on a rooted device. Don't plan to try it myself.

Is that a typo, 2000000? At max of 2A would be 2000ma.
9th January 2013, 05:43 PM   |  #232  
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That's because it's at 91% charged, so has slowed down. You need to measure at a much lower charge level.

Also, the 2000000 is not a typo, it was copied and pasted. The unit is just microamps instead of milliamps.
Last edited by derobert; 9th January 2013 at 05:48 PM.
9th January 2013, 06:07 PM   |  #233  
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Quote:
Originally Posted by derobert

That's because it's at 91% charged, so has slowed down. You need to measure at a much lower charge level.

Also, the 2000000 is not a typo, it was copied and pasted. The unit is just microamps instead of milliamps.

That's true, the charge changes from constant current to constant voltage at 4.2V. Ah, microamps!
9th January 2013, 09:08 PM   |  #234  
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Quote:
Originally Posted by wptski

The one from 3C.

---------- Post added at 08:41 AM ---------- Previous post was at 08:31 AM ----------


Just use the Battery Monitor Widget from 3C, you can set the interval down to one minute. I guess that I=91 is current but how do you tell if that is charge or discharge? Is that 91A, 9.1A or 0.91A? The BMW will do that for you.

C is current in milliamps. This is the current at the battery so it includes power draw from the rest of the tablet.(that's why its not the 2A most would expect)

Plug in the microusb and check the current, then plug in the pogo cable and check the current. Then subtract the two.

Sent from my Nexus 10 using Tapatalk HD
9th January 2013, 09:23 PM   |  #235  
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Quote:
Originally Posted by dalingrin

C is current in milliamps. This is the current at the battery so it includes power draw from the rest of the tablet.(that's why its not the 2A most would expect)

Plug in the microusb and check the current, then plug in the pogo cable and check the current. Then subtract the two.

Sent from my Nexus 10 using Tapatalk HD

Similiar to the moderm gas vehicle, power is drawn from the battery, it's replaced by the charger which is supplied by the 2A power supply or AC wall unit.

I don't have my POGO charger yet but noone has compared the USB and POGO charging rate at below a battery voltage of 4.2V to show the real maximum difference. It's been mentioned that the charging circuit is maxed at 2.0A, so anyone that's getting a larger PS isn't going to gain anything.

In Ohm's Law, I=current, V=volts and R=resistance.
Last edited by wptski; 10th January 2013 at 01:19 AM.
9th January 2013, 09:48 PM   |  #236  
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Just need someone to install battery monitor widget.

Then with battery somewhere below 50% charge with usb for at least half an hour with screen off then swop to pogo for half an hour.

Sent from my GT-I9100 using Tapatalk 2
9th January 2013, 10:44 PM   |  #237  
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Quote:
Originally Posted by demusss

Just need someone to install battery monitor widget.

Then with battery somewhere below 50% charge with usb for at least half an hour with screen off then swop to pogo for half an hour.

Sent from my GT-I9100 using Tapatalk 2

It's already been done. USB is around 1.6A, POGO is around 1.9A
10th January 2013, 12:13 AM   |  #238  
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Quote:
Originally Posted by espionage724

The question I have is, will it charge the device faster then it drains? For example, can I have max brightness, performance governor at 1.7GHz, and play some demanding game, and not have battery drop?

Anyone care to test this at all?
10th January 2013, 12:27 AM   |  #239  
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Quote:
Originally Posted by espionage724

Anyone care to test this at all?

Tested, doesn't drain streaming 1080p mkv on full brightness. In fact I netted 2% in like 20 minutes. Posted this last night.

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10th January 2013, 12:56 AM   |  #240  
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Quote:
Originally Posted by skally

It's already been done. USB is around 1.6A, POGO is around 1.9A

Where? Have a link?

I've speculated this but I haven't seen anyone actually test it.

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