[HOW-TO]Hardware battery modification for Xperia T

[peetr_]

It is only for people facing problem with battery stability.
If you don´t know what is going on here, please don´t ask or don´t try to do anything from those photos.

I don´t know how would I describe this procedure in English, so here is such a photo tutorial. Now I have both batteries like this.

It is just connecting the minus pole of phone to the minus pole of battery and thus bypassing the protection in the circuit.

Of course, I am not responsible for any damage you do with this modification. Do it very carefully. It is battery, so the voltage is still present. I think the only two reasons for such kind of protection could be water and some other kind of short circuit, because the battery is not removable. Though it shouldn´t be a reason for "random" reboots, but it is.

 

[eybee1970]

It is only for people facing problem with battery stability.
If you don´t know what is going on here, please don´t ask or don´t try to do anything from those photos.

I don´t know how would I describe this procedure in English, so here is such a photo tutorial. Now I have both batteries like this.

It is just connecting the minus pole of phone to the minus pole of battery and thus bypassing the protection in the circuit.

Of course, I am not responsible for any damage you do with this modification. Do it very carefully. It is battery, so the voltage is still present. I think the only two reasons for such kind of protection could be water and some other kind of short circuit, because the battery is not removable. Though it shouldn´t be a reason for "random" reboots, but it is.

ups...I send you my phone to do it :angel:

 

[djtj0989]

pretty cool!!

 

[bolillo]

So this actually fixes SOD issue and random reboots?

Sent from my LT30at using xda app-developers app

 

[peetr_]

This solves each random reboot, for which you can't find any reason in last_kmsg and happens at high actual usage or at low battery percentage.

 

[djfuego]

Water damage

Anyone tried this on a water damaged phone?

 

[vassilyo]

oh my friend thanks this work :good:

 

[syntesys]

I have random shutdowns at low percentages as at high percentages and, in this moment, my Xperia T doesn't start if is not connected to charger. Is this the solution for my problem?

Meanwhile, I ordered a new battery.

Thank you.

 

[fistrodelapradera]

Good afternoon, I'm using google translator to speak in English because it take long to write, I hope you understand.

I have two phones xperia t with the same situation, the two I've changed the battery and restarted when both want.
If I have noticed that very hot but not only turn off when heated but they do sometimes too.

Took several days trying to find a solution and seeing this post I think I have a chance to solve the problem once and for all.

Tomorrow I'll get back to work on the solution that the user has peetr_ published a year ago, it proves the results and will comment that this has gone.

Thanks and regards.

 

[OabsT]

So i just connect to the negative terminals and that it? Or i do the same with the positive terminals?

 

[BigDnm01]

I have 3 Xperia T and an Xperia SP that all randomly restarts. I hope this would fix the issue, but is there any adverse effects, danger to doing this? I'm assuming since it's bypassing a protection circuit, the battery can get heated up. Can someone enlighten me on this. btw, did you glue the wires to the poles? I see a soldering gun, but what is that liquid?

 

[PeterGeorgiou]

will this fix any issues such as Sleep of Death???

 

[n2hearse]

This post must be in top positions. Totally fixed my reboots below 60-70% of battery (one year old and failing seriously since last month). Superb MOD!

 

[energywire]

what type of liquid was used ? i would like to know ASAP

 

[dionisis1976]

Will try this on my xperia sp, many thanks.

The liquid is probably flux (helps with the soldering)

 

[irambona cedric]

xperia T

THNXXX so much you save my T

 

[theophan]

Works like a charm

To moderators: Please, stick this thread up, this is the only working solution for xperia t ****ty battery controller glitches. Thanks.

 

[InfinitelyCrazy]

How to do this on Xperia V LT25i

Please can you give me a photo tutorial or any tutorial like this for Xperia V LT25i.
I have the same problem (Random reboots/shut offs for no reason). And I really need to fix this. :crying:
Can someone show me how to bypass the battery protection circuit on Xperia V LT25i.
Thanks.

 

[leonsandroid]

MODERATORS PLEASE MAKE THIS A STICKY FOR XPERIA T. very valuable information and solved the random cut off with my phone so as everyone elses.

 

[replete]

Just chipping in on why this might be a good idea.

I've discovered on this phone that if the phone gets TOO flat (Mine got to 2.9v), the phone wont charge it at all. For some reason, in this instance, the charging circuit only releases around 1 to 1.2 volts to the battery - nowhere near enough to charge it - despite the 5v coming in from the USB port. I test all this with my meter on the exposed contacts.

To get my phone working again, I had to remove the battery from the phone, and charge the battery manually up to 30% by running 4.2V into it from a variable DC workbench power supply.

So, if you have a 3.3-4.2v power supply around (even a few AAs taped together if you're desperate), just manually charge the battery, and dont let it run all the way down again.