Samsung Galaxy Phone Rapid Charger Mod

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gndmstr

Member
Jun 10, 2012
7
0
Very informative. This is definitely considered 'secrets' of success :)

Since I use my non Samsung chargers for many things, I opted to use the cable approach. I cut one of the many cables I have around and tied the white/green together on the phone side of the cable leaving the charger side open "just in case". I have the cable well marked and it works well.

Thank you!

Chuck
 

tjb433

Senior Member
Mar 16, 2011
201
31
I would like to know if this is true for the Galaxy s3? would love to get AC charging mode in my car
 

tjb433

Senior Member
Mar 16, 2011
201
31
read the thread.. it is a standard.

I read the thread, it is a standard that is defined for galaxy phones as of last year, this phone is less than 2 months old. MHL was a standard, but they changed that so who is to say they haven't changed the charging modes as well. They could have grounded one of the pins, or connected a resistor between the 2 pins to trip AC charging.

Edit, nevermind, i found the info i need, turns out they did not change it, which is nice to know.

Sent from my SAMSUNG-SGH-I747 using xda premium
 
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laughingT

Senior Member
Oct 30, 2011
618
461
Oakland, CA
please show a photo of the other side of the board.

you could also use a volt ohm meter to test for continuity between usb connector middle pins and the solder points on the board.

Sent from my SAMSUNG-SGH-I897 using xda app-developers app
 

Ttblondey

Senior Member
Jan 1, 2008
1,690
103
I connected the 2&3 pins(jumper and solder it) it comes to square one) I'm using original cable data + charging. I'm getting a 2100 mah double usb charger and going to mod it.
 

laughingT

Senior Member
Oct 30, 2011
618
461
Oakland, CA
looks like you got it.
you probably want to put electrical tape or some kind of insulation, like rtv silicone, around that jumper wire.

Sent from my SAMSUNG-SGH-I897 using xda app-developers app
 

Ttblondey

Senior Member
Jan 1, 2008
1,690
103
It's only 400 mah charging took 6 hrs cause it's only 400 mah. just buy a 2000 mah charger going to mod It.
 

Ttblondey

Senior Member
Jan 1, 2008
1,690
103
I thought of soldering the two (red)parts together or shorting 2 wires as my post before .If you all notice the third pic. shows that it can charge two device Ipad or tab and phone.So I think the one that was factory soldered (Bottom)is the one for Ipad / tab or above 2000 mah device.
 

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laughingT

Senior Member
Oct 30, 2011
618
461
Oakland, CA
I thought of soldering the two (red)parts together or shorting 2 wires as my post before .If you all notice the third pic. shows that it can charge two device Ipad or tab and phone.So I think the one that was factory soldered (Bottom)is the one for Ipad / tab or above 2000 mah device.

yup, you got it.

You may want to leave the ports as they are. some devices can't take advantage of higher current.

Sent from my SAMSUNG-SGH-I897 using xda app-developers app
 

Ttblondey

Senior Member
Jan 1, 2008
1,690
103
Haven't done the soldering ,try charging my s3 to the top port it doesn't charge Charging to the bottom port it charges as per normal.Thought of soldering as per planned , worried that I can't charge device below 2000 mah like my HTC TYTN 2.

Update:
Top port use for charging mp3 player,will try charging using bottom port when i get home. Charging my S3 . using the bottom port is much faster it seems double the time than using the adapter at the first post.
 
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  • 22
    This post will show you how to MOD an un-official Samsung USB wall charger into one that will enable full speed charging on Samsung Galaxy S phones.

    8 $ ebay cheap wall battery charger power output specs:

    350 mA battery charging speed - doesnt matter...
    800 mA USB port.. THIS IS WHAT YOU WANT!! more the better. nice if the phone would use all of it... Need AC Mode... (thats what this post is for!)
    Samsung wall USB charger is only 750mA! AND it will set AC mode.

    The theory behind it is with samsung galaxy phones and "official chargers":
    if the middle 2 data pins on the usb, while getting 5v to the outer 2 pins it tells the phone that it is an *official samsung* charger and enables full speed charging.

    without the middle 2 pins connected (with or without data flow) will not charge at full speed. even if you supply 800mA it will only charge around 350mA


    well there have been posts of cable hacks to do this or adapters... ha! tape and tinfoil... or hack the cable apart! And you cant use the cable with the PC anymore!
    heres my mod... bend 2 pins.. DONE! solder if you know how for better connection!

    ***only use this charger for samsung phones, not all USB devices will like this, -may dammage some- as the samsung phone is PROGRAMMED to know what to do if the 2 data pins are shorted out***

    Phone confirms AC charging NOT USB NOW!!
    Now i can leave my Samsung Charger upstairs, and this one downstairs.


    Rapid%20Charger.JPG




    You know how long it takes to charge an extended battery on USB mode? almost 5 hours! or at 350 mah in the battery charger? almost 7 hours!
    I was able to charge my extended battery (says 2500mah) from 8% to 100% in about 2 hours 45 min over USB cable (AC mode) with the screen off. In the official samsung charger it was a little over 3 hours. just in the battery cradle it takes around 5-6 hours. Very much improved!
    5
    Good guide. I did the same modification to my Verizon car charging cable. I don't have Verizon, but I swapped an iPhone car charger with a verizon user who got rid of his Motorola Android.

    This mod works on any charger. The device will always display "Charging(AC)" and this enables full charging capability.

    I modded my cable by taking apart the microUSB connector and dropping a bit of solder between pins 2 and 3 on the back side of the connector. It works great.

    Do not do this on a cable which may be connected to a PC. If the PC is older and does not have overcurrent protection, it may fry the USB Power Supply.
    4
    Do you mean to build a kernel that has different settings for the USB resistor input? What/where was the specific change you made?

    Voltage regulator and the charging current part: max8998-private.h, a file that contains charging values in mA:

    Code:
    #define MAX8998_ICHG_90		0
    #define MAX8998_ICHG_380	1
    #define MAX8998_ICHG_475	2
    #define MAX8998_ICHG_550	3
    #define MAX8998_ICHG_570	4
    #define MAX8998_ICHG_600	5
    #define MAX8998_ICHG_700	6
    #define MAX8998_ICHG_800	7

    Battery driver part: s5pc110_battery.c and defined AC and USB charging rates (modified by me to 800mA when on AC and 550mA on USB):

    Code:
                          if (chg->cable_status == CABLE_TYPE_AC)
    				max8998_write_reg(i2c, MAX8998_REG_CHGR1,
    					(MAX8998_TOPOFF_10	<< MAX8998_SHIFT_TOPOFF) |
    					(MAX8998_RSTR_DISABLE	<< MAX8998_SHIFT_RSTR) |
    					(MAX8998_ICHG_800	<< MAX8998_SHIFT_ICHG));
    			else if (chg->cable_status == CABLE_TYPE_USB)
    				max8998_write_reg(i2c, MAX8998_REG_CHGR1,
    					(MAX8998_TOPOFF_25	<< MAX8998_SHIFT_TOPOFF) |
    					(MAX8998_RSTR_DISABLE	<< MAX8998_SHIFT_RSTR) |
    					(MAX8998_ICHG_550	<< MAX8998_SHIFT_ICHG));

    One more thing in i9000 kernel sources: drivers/usb/gadget/android.c

    Code:
    #ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
    /* soonyong.cho : This value of max power is referred from S1 */
    	[COLOR="Red"].bMaxPower	= 0x30, /* 96ma */[/COLOR]
    #else /* original */
    	[COLOR="YellowGreen"].bMaxPower	= 0xFA, /* 500ma */[/COLOR]
    #endif /* CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE

    from where I removed the condition to make it look like that:
    Code:
    [COLOR="YellowGreen"].bMaxPower	= 0xFA, /* 500ma */[/COLOR]

    BEFORE:
    96ma.jpg


    AFTER:
    500ma.jpg
    2
    usbcable.jpg


    Here is a picture of the pinouts in a usb cable..

    Now obviously you have the 5V, Ground, and data, but then where would you add in more power?
    2
    Wow i'm so lost, so does this apply to the vibrant...

    You know maybe I have had my foot up my ass for sometime then..

    I ALWAYS charge my phone with the USB charger connected to the computer and it seems to take forever...

    You must forgive me but I always leave my phone charging on my PC everynight and have actually lost the AC power wall plug portion...

    Will connecting this through the USB of the computer also only supply the 350mA instead of the full 800mA like your saying, or will the computer always deliver the sexy amount?

    Thank you sir, you are a genius?

    if the 2 data pins arent joined the phone WILL NOT receive anymore than 350. this tells the phone "im an official charger, take more!"
    if you are going to mod a cable to have the 2 data pins joined, make sure the 2 pins shorted on the phone end and NOT THE PC END of the cable, and NOT BOTH EITHER. shorting the data pins on the computer side can blow your usb port.... or more.