My DIY p769 extended battery.

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fastwanabe

fastwanabe

Senior Member
Jan 20, 2007
196
23
Hi fellow l9'ers

I purchased an OEM battery to have as a spare battery since I'm usually out of battery when I most need it but forget to bring it or charge it. After having so-so experiences with aftermarket extended batteries on other phones I decided that if I wanted good results on the cheap I need to make it myself. Still testing it out but initial impressions are good.

BTW.. yes it looks horrendous and I do know that it could blow up, ruin my phone, cause cancer and start WW3.... but thanks for your concern.

Source of inspiration. http://xdaforums.com/showthread.php?t=1800177&highlight=battery+mod


9/4/13 Update.... after using it on a daily basis and swiping back and forth between the oem battery and my jerry-rigged battery I can say its definitely working. The performance has gotten constant and I did a battery drain comparison between the 2 using the app called FAST DISCHARGE. All option selected and cpu set to full load with temp set to unlimited. I did remove two of the jumpers and only left positive and negative connected.

OEM BATTERY........... 2hr 5min 13 sec
JERRY-RIGGED BATT..........3hr 35min 21sec

I suspect that it doesn't last double since both circuits are being powered when charged...... the first battery to be fully charged send a signal to the charger to shut off hence the lack of full power.

Over all for $10 bucks I'm not complaining.
 

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wbc1228

Member
Apr 25, 2012
34
20
How does the battery stay in place? double side tape?
Also, what is the battery life on this uhmmmm... phone?
 
L

lazydevice

New member
Aug 8, 2013
1
0
How is it?

I am very interested in trying this if your results are good...How has your battery life been affected? Has it doubled? Do you use a case that works with the new "power bulge"?
 
Meda808

Meda808

Senior Member
Nov 17, 2011
130
82
Chico, CA
I did that to my old i897 captivate. you only need the positive and negative connected. you're connecting the two circuit boards together which may cause problems. i would remove that one. Unless you can find a battery charger that supplies more amperage you most likely will never get that battery fully charged no matter what the android meter says.
 
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fastwanabe

fastwanabe

Senior Member
Jan 20, 2007
196
23
Ok, after a few days of heavy usage I have come across sporadic performance results. In a few occasions it would out last the original battery under the same usage and other times it would perform as a stock battery. I plan on purchasing an external charger since I suspect that both batteries are not fully being charged as the previous post mentions. I will also disassemble the second battery and take the circuit out of the equation. So far I am pleased with it's performance even though it's not consistent.
 
Meda808

Meda808

Senior Member
Nov 17, 2011
130
82
Chico, CA
fastwanabe said:
Ok, after a few days of heavy usage I have come across sporadic performance results. In a few occasions it would out last the original battery under the same usage and other times it would perform as a stock battery. I plan on purchasing an external charger since I suspect that both batteries are not fully being charged as the previous post mentions. I will also disassemble the second battery and take the circuit out of the equation. So far I am pleased with it's performance even though it's not consistent.
Click to expand...
Click to collapse

Cool. i work in batteries so i didnt check out dudes guide other than his soldering was good lol. essentially all you're doing is connecting the batteries in parallel. since both batteries have a circuit board that controls low voltage and temperature safety, you only need to use one as the battery will still be a 3.6v cell just double the capacity. stock LG charger shipped w/ L9 outputs .85 amps so if you could find one that did 1.5amps or 1500mah you'd be in good shape.
 
zviki

zviki

Senior Member
Dec 30, 2008
1,401
212
Maribor
Like @Meda808 said,you only need to connect two pins... + and -.You will also need stronger charger but... There is a circuit in a phone which controls power to battery(I think that that's why is one of the two middle contacts on battery) so... Maybe with external charger?

Sent from my P760 using Tapatalk 2
 
Paarix

Paarix

Member
Aug 21, 2013
7
1
Well, good feature, but on the other hand smartphone becomes fat, and if I look on way I use my phone, I won't do DIY like this.
 
OptimusL

OptimusL

Senior Member
Apr 6, 2013
183
41
That looks interesting, but I wouldn't be able to get over the hump.

Sent from my LG-P768 using XDA Premium 4 mobile app
 
fastwanabe

fastwanabe

Senior Member
Jan 20, 2007
196
23
Small update......

So far so good, no major issues. I purchased the anker standalone charger and it charges the battery but it takes way to long(10-15hrs) So I just charge it in the phone now. The battery lasts me a full day under heavy heavy usage. Prior to this by 2-3pm it was out of juice.

I have noticed that it has become less sporadic the more I use it.

Iheartradio 4-6hrs a day, dish anywhere 2-3hrs a day, calls:30-1hr. This is with WiF(thanks Home Depot), data and Bluetooth(LG Tone)on for most of the day.../.. I'm happy I did it.

I unplug at 4:45am and plug it in by 8-9pm with about 20-30% left.

I have not modified the connection yet so I suspect that it still might not be fully charged even with the aftermarket charger.

About the hump..... I got use to it quiker than I thought.
 
Last edited:
fastwanabe

fastwanabe

Senior Member
Jan 20, 2007
196
23
9/4/13 Update.... after using it on a daily basis and swiping back and forth between the oem battery and my jerry-rigged battery I can say its definitely working. The performance has gotten constant and I did a battery drain comparison between the 2 using the app called FAST DISCHARGE. All option selected and cpu set to full load with temp set to unlimited. I did remove two of the jumpers and only left positive and negative connected.

OEM BATTERY........... 2hr 5min 13 sec
JERRY-RIGGED BATT..........3hr 35min 21sec

I suspect that it doesn't last double since both circuits are being powered when charged...... the first battery to be fully charged send a signal to the charger to shut off hence the lack of full power.

Over all for $10 bucks I'm not complaining.
 
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    fastwanabe
    fastwanabe
    Hi fellow l9'ers

    I purchased an OEM battery to have as a spare battery since I'm usually out of battery when I most need it but forget to bring it or charge it. After having so-so experiences with aftermarket extended batteries on other phones I decided that if I wanted good results on the cheap I need to make it myself. Still testing it out but initial impressions are good.

    BTW.. yes it looks horrendous and I do know that it could blow up, ruin my phone, cause cancer and start WW3.... but thanks for your concern.

    Source of inspiration. http://xdaforums.com/showthread.php?t=1800177&highlight=battery+mod


    9/4/13 Update.... after using it on a daily basis and swiping back and forth between the oem battery and my jerry-rigged battery I can say its definitely working. The performance has gotten constant and I did a battery drain comparison between the 2 using the app called FAST DISCHARGE. All option selected and cpu set to full load with temp set to unlimited. I did remove two of the jumpers and only left positive and negative connected.

    OEM BATTERY........... 2hr 5min 13 sec
    JERRY-RIGGED BATT..........3hr 35min 21sec

    I suspect that it doesn't last double since both circuits are being powered when charged...... the first battery to be fully charged send a signal to the charger to shut off hence the lack of full power.

    Over all for $10 bucks I'm not complaining.
    View
    1
    Meda808
    Meda808
    I did that to my old i897 captivate. you only need the positive and negative connected. you're connecting the two circuit boards together which may cause problems. i would remove that one. Unless you can find a battery charger that supplies more amperage you most likely will never get that battery fully charged no matter what the android meter says.
    View
    1
    W
    Wicked2013
    hahaha ill give ya props for ingenuity
    View

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