yashsingh1/xdaforums huggingface dataset:
[Huawei Ideos X5 U8800] yannn007:
Maybe this helps: http://forum.gsmhosting.com/vbb/f606/htc-desire-z-jtag-pinout-needed-1237949/#post7161163

Desire Z uses the same chipset as U8800
[Huawei Ideos X5 U8800] xilence0:
Hi,

did anyone get a solution for this?

My phone is also bricked and I would like to flash it with JTAG.
[Galaxy Note GT-N7000 Q&A, Help & Troubleshooting] sianhulo:
My brother want to buy one of those, they're imported, therefore, they aren't any cheap (8500bsf, almost 2000$) and they probably won't replace them (remember Indie Sellers) so I want you to tell me which hw and sw problems do this smartphone has and the better ROM for note. Thanks beforehand.

sorry If you don't understand Mt English

Enviado desde mi GT-I5700
[Dell Streak 7] primetime34:
I'm looking for a folio-like case for the Streak, but I'm hoping to find one in the $10 range instead of the $30 range. Anybody know where one can be found? Thanks.
[Samsung Galaxy Nexus] Treken:
A friend and I worked on creating an OS specifically for Android Development. While I am waiting for Moderation approval to create a tread in the Galaxy Nexus forum I will post the link to the existing tread in XDA. It's here:

http://xdaforums.com/showthread.php?t=1254909

I am currently using it to compile from source and works like a charm. I've installed it directly to an external HDD but was running it in VBox and it's set up to work in full screen mode on VBox. It's 64bit which is a given for compiling Gingerbread or ICS.
[Hardware Hacking General] ronkoni:
Is it possible/safe to connect an external battery of same voltage but different mAh directly to the internal battery of a tablet to raise its mAh?

I am thinking about moding a tablet case to have a built in battery pack for my Iconia a500 tablet. I can easily squeeze 4 cell phone batteries in between the folds and make two 3.6v 3000mAh(or higher) battery pack with out adding much bulk or weight to it. can probably squeeze a usb hub in there too while i am at it.

I looked at the internal battery and it looks like i can splice its wires and add a connector to hook to the two 3.6v packs for easy connection.

I don't know much about electronics, but from my limited knowledge and layman point of view, as far as the tablet is concerns, it will just have a higher capacity battery, wont it?

can it be done safely without any other electronic components?
[Hardware Hacking General] Rebellos:
I'm not expert in that matter, but I think there's LiIon battery, and AFAIK it may make some confusement to your Fuel Gauge IC and Battery Charging IC, as these are probably calibrated to work with that certain battery type and capacitance. But I don't believe it may damage something if you connect it paralelly.
[Hardware Hacking General] Nicko011:
I would be careful with that if I were you. While it seems simple enough, batteries are much more complex than just voltage and capacity.

Most of the time, external batteries just go through the charging connection of the device so it can handle the power itself. If you connect it directly, you may bypass some part of the charging circuit (often times there's a circuit in the battery itself). Basically, I'm thinking the batteries may not fully charge or one will overcharge. It really depends on how it's set up. I'm not an expert with the design of rechargeable batteries though, so it may be safe.

In short, I would suggest connecting the batteries to the charger to extend your battery life. I'm sure others can offer additional insight.
[Hardware Hacking General] Eeroz:
A good read about batteries: http://batteryuniversity.com/learn/article/serial_and_parallel_battery_configurations

I can't comment on if it will work or if it is safe..
[Hardware Hacking General] ronkoni:
cellphone batteries have a built in protection to prevent them from overcharging or discharging, don't they?

The problem i have with connecting to the charging port is that it needs 12v. connecting 3 or 4 of battereis will give me either too little or too much volt. cant get 12v out of 3.7v batteries with out some kind of additional electronic parts to regulate the voltage. I don't have the sufficient knowledge to do that. this is why i figured ill do it directly. And charging would be simpler too if i can use the charger to charge both the internal and the external batteries at the same time.

Was hopping to hear from someone who did that already. I guess no one is brave/dumb enough to try it. ;)
[Hardware Hacking General] deepakpatil001:
Sounds intresting looking forward for it
[Hardware Hacking General] samotronta05:
In a "perfect" environment this would be possible.

The inner resistance and voltage difference of the different batteries would even out the different capacity while charging.

You can avoid having these currents between the batteries by using diodes to separate the charging currents.

However my recommendations in terms of reliability, safety and efficiency is to use two or more batteries with the same capacity and dis-/charging curve.
[Hardware Hacking General] ridethisbike:
is it the phone or the battery that cuts current when the battery is fully charged?
[Hardware Hacking General] samotronta05:
On most phones tablets etc. it's the device that cuts off the charging current when the battery is fully charged.

However nearly ever batteries has also a protection circuit that cuts off the battery in case of

under, over voltage and over current, sometimes even over temperature.
[Hardware Hacking General] ridethisbike:
ah, well it seems to me that if the battery has to take action, then you're doing it wrong.

I'm not sure exactly how diodes work so I can't comment on that, but definitely use like batteries (two 3000mAh batteries as opposed to one 3000mAh and one 3600mAh) as to not confuse the device about the charge, causing the 3600 to not get fully charged. just make sure they get connected properly (in parallel) and it should work just fine.

in reality its no different than someone using 4 car batteries to power their car audio system. as long as its done properly (in parallel), there is really no harm.
[Hardware Hacking General] giritrobbins:
I wouldn't recommend it. While technically it is something that you can do like other posters have said the internal power system is configured in a particular matter. It is likely that the regulation and protection are minimal if they only expect the internal battery. There is also the issue of charging, if you did as you say, you would be discharging the batteries into each other if they weren't exactly at the same levels. So this isn't the recommend method.

What I would recommend you do is put them together so you get something over six volts (two 3.6V packs in series) and put a 5V regulator on it. Then connect it to a USB cable and charge through there. That way you utilize the systems built in protection, aren't messing with the battery connections and can swap it in much easier.
[Hardware Hacking General] showlyshah:
You can... as far as u meet these requirements.

1) notice ur original battery voltage..

2) buy some same kind of them, or u may use others, provided the voltage is same. If u can find higher watt-hour( current) battery of same voltage, go for it.

3) never mix up different amp/ voltage rated batteries together. Ie if u have 3.7v 3200ma batt, and planning to add one more batt in parallel to it go for another 3.7v 3200ma , and not 3.7v 1500ma or 3.5 v 3200ma batt.

4) if u cant find a higher capacity batt of same voltage, go for parallels. Ie join together the positives of two or more batt, and also join together their negatives too.. connect it to the batt terminals of tab,

5) no problems will be caused if u use high current batt, provided u have suited the correct voltage. In ur case u have to ensure proper voltage only. And current can increase to any value.. the system takes only what its needed.

6) the sad thing is it will take more time for charging. But never try to increase the charging current. It will damage the power section. But increase ur patients. Most of the tabs got 1-1.5 amp charger. Never increase the limits.

U may go for it. If u can manage these...
[Hardware Hacking General] samotronta05:
Yes, to charge with a constant current until a certain voltage is reached.

Yes, this is the main problem and it's also the reason i recommended using two batteries with the same capacity. Otherwise the constant charge and discharge depending on the size of the difference between the batteries makes the system very inefficient.

Which would make it even more inefficient.

You can mix up different batteries when the voltage is the same, however this is not a the recommend way, since you will not encounter much gain in capacity.

The in terms of capacity smaller battery will be charged by the bigger one all the time.

However if you say i don't care about the efficiency then you can mix up for e.g. a 3.7v 3200mAh and a 3.7v 3000mAh battery.
[Hardware Hacking General] giritrobbins:
The issue when you connect them like that will always occur when they are in parallel (you need to add some logic or some diodes in there). Using the same ampacity battery will mitigate it to a point but the internal resistance of a battery will dictate how fast it drains down.

As for the charging, that isn't what i am saying. The internal circuitry that he cannot change is expecting a certain battery with certain characteristics. Putting a second battery in there in parallel will potentially mess with that stuff. If it doesn't realize the size of all the attached battery it will register a fault because it won't be charging correctly.

He isn't going for efficiency here. And a linear regulator is easy, if we want efficient we can do that too. I was just suggesting an alternative that could be easily done.

And the most important point is not about voltages but about chemistry. Different chemistry have different voltages and different knees where they drop suddenly.
[Hardware Hacking General] ronkoni:
The original battery is 7.4v 3350mah. and the charger is 12v 1.5a.

so matching or passing that with batteries I can fit in the space I want it to fit in is a problem.

I was going to use 4 i9000 1500mah batteries, which would fit perfectly, to make a 7.4v 3000mha. but that would be lower then the original. i guess i can try to find higher capacity batteries that i can fit in the case

But if i understand it correctly, the current will keep flowing from the larger capacity battery to the lower one, it will keep them at 100% until the original will drop to lets say 3000mah and then they will all drain at the same rate until they are all empty. and when i charge them, the charging circuitry will get its information only from the original battery, so it will keep charging until the original is full. it may not be as efficient, but it should still get me a significant boost, wouldn't it.

I suppose I could connect them all to make a 14.8v 1500mha with a 12v regulator and use the charging port, but that will leave me with the problem of charging the external pack. no idea how to do that. how do i cheaply and safely charge a 14.8v battery pack?
[Hardware Hacking General] showlyshah:
Hey why are u going to make a 14.8v batt pack when urz original ones are 7.4??? I dont realy understand the logic. If u have extra batt, then make the pack like this

Batt pack of 7.4v × 2 and connect them in parallel, thatz all, no need to modify charging circuits, no need to regulate the voltage, and no loss in voltage/ current,

But if u make a high voltage pack, u have to regulate the o/p with some ic, and in turn u will suffer some v/c drop.
[Hardware Hacking General] ronkoni:
i like to connect directly to the battery, but some seem to believe it is not wise if the mAh of the original is higher then the external pack.

The 14.8v pack with a 12v regulator option is for use with the tablet's charging connector which require 12v . A safer option, but leaves me with the charging problem.
[Hardware Hacking General] ridethisbike:
http://www.ebay.com/itm/USB-2-0-fem...ultDomain_0&hash=item3f0cd836f3#ht_2792wt_902

that actually took me a lot longer to find than I had originally planned... lol. of course.... you're going to have to find the rest of your charger. but that'll be easy with that adapter
[Hardware Hacking General] showlyshah:
So its a about making a batt pack which u can connect to the tab via charging port? And use it like a backup when u r out of power?

If its ur idea, you may tell about the size of the pack, and how long u need to use it( ie backup time), if u do, i will find out the solution, also post ur current batt and charger spec.

And hope i can help with some circuits too..
[Hardware Hacking General] ronkoni:
the idea is to have a battery pack that can fit in between the layers of the stand part of this tablet's case. the available space I want to use is about 2"x9" so since the space is limited, the batteries must be the flat type and be able to get 12v out of them and be able to charge them externally.

this is the original tablet battery and the charger is 12v 1.5a.

4x Samsung i9000 1500mAh batteries fits perfectly. and since i already got 2 extra ones laying around, might as well go with these batteries. unless it is possible to get 12v out of 3 batteries. then i can probably use 3 Samsung note 2500mAh batteries instead.

so, what circuitry do i need to make this thing power the tablet and get charged?

thought about getting one of these battery packs, take it apart and replace its batteries with mine. since it already got the necessary circuitry for regulating the voltage and for charging, it would cut down on the guess work and probably be cheaper to build. i think they use 3 batteries in there which would be better.
[Hardware Hacking General] giritrobbins:
DON'T DO THAT!

So what I was recommending is to get some batteries and get their voltage in series over 12 volts. Then make a circuit like this:

http://circuits.datasheetdir.com/38/UTC-LM7805-circuits.jpg

The batteries would need to be charged externally somehow; that is the difficult. Likely you are going to need to be able to take apart your mod and charge them in a external charger.
[Hardware Hacking General] ronkoni:
Yes, charging is my main problem.

that is why at first i wanted to connect directly to the internal battery.

and that is why dissembling that cheap ebay pack and using its circuitry and charger seemed like a good alternative too. :)

so why exactly shouldn't i do that?

what is inside that pack that i cant re-purposed for my needs?
[Hardware Hacking General] giritrobbins:
Why, because the internal circuitry there is configured for that battery pack, meaning that capacity, that voltage, that chemistry. All of those play very important roles in the charging circuitry and can become very dangerous.

I don't know what to say. I have to think about it some more,
[Hardware Hacking General] ridethisbike:
EDIT: just read one of your posts about getting 4 batteries. i'm assuming you are talking about hooking them up in series parallel. why not get different batteries that have 1600mAh capacity, which would put you at 3200mAh, a lot closer to your stock capacity. or even a 1700mAh which puts you just barely above your stock battery?

also, just wanted to throw this out there... if i'm reading and understanding everything correctly, putting 3 batteries together (series) would give you 11.1v max. would that be enough that the tab would recognize it as a 12v charge source and let you plug it in through the charge port? and further more, as that pack drained... at what point would the tab no longer see it as a viable power source and stop pulling power from it?
[Hardware Hacking General] giritrobbins:
http://www.ladyada.net/learn/lipoly/

There is some background. What I was talking about is putting them in series to get the high voltage. As for 11.1 volts I don't know that is something that would need to be tested. The voltage that it would shutdown is another thing that you would need to test.

Does the tablet charge through the usb port?

Edit I see that it doesn't charge through the usb port unfortunately. I would say find a bigger battery pack or find one with a 12V output
[Hardware Hacking General] xHausx:
liion and lipo batteries are inherently unstable so you're going to want to be real cautious about modifying them to begin with, but I do remember hearing someone say they got a Chinese

Extended battery for a phone from Ebay and when they took it apart it was just two in parallel. But, normally multicell batteries charge each cell separately so they all get charged safely.

Running them in series will probably be a non starter from the get go, the over voltage protection each battery (should) have is usually just a type fuse that will blow if it's a few hundred millivolt over it's normal peak voltage.
[Hardware Hacking General] ridethisbike:
yea. lipo batteries catch fire if the cell is ruptured... lol

as far as running multiple bateries in series should be a problem. most lipo batteries you get for things like R/C cars are in series, thats how they get the voltage they do. but you are absolutely right about the charging aspect. which is why the OP should NOT get that ebay battery he posted. it's garbage.

that being said, if you got a lipo battery with the voltage needed (a good one), it'll already have the separate connector for charging. you'd just have to disconnect it from the tab when you charge it. oh and you'd have to buy a charger too... and those can get pricey.

personally though, I agree and wouldn't mix a li-po and a li-ion battery on the same circuit. i'd be more inclined to see if I could fit a lipo in the original batteries place, or take the original out entirely. but doing all that just seems like too much work.

I don't see the harm in getting a couple cell phone batteries and putting them in series-parallel though. just match the voltage and try to match mAh and you should be good. if it were me, thats what I would have done. and I would have done it already...
[Hardware Hacking General] ronkoni:
so what you saying is that even if i make a 7.4v out of 2 or 4 3.7v batteries and manage to connect them directly to the internal battery, i still wont be able charger it? the batteries' internal protection won't allow it? taking apart the pack every time i need to charge it is not practical.

I am running out of ideas. :(

I think I am over my head here. best not be messing with it then.

Thanks for all your helpful insights.
[Hardware Hacking General] ridethisbike:
that's not what i'm saying at all. just stick with li-ion batteries and you should be fine. seriously. you can do it. i have faith (and enough electrical knowledge to know it will work). if i had the need to do what you are trying to do, i would do it.

i'm serious man. what you are trying to do is the EXACT SAME as someone hooking up 2 car batteries to power their car audio system.
[Hardware Hacking General] adamscott:
90 to 100 minutes is the average life expectancy of a laptop battery and is often not enough time to complete your work. One option is to use the power of the external battery. Such as its power and connection type is not specific to notebook computers, external battery, allows you to use the most common laptop. Common brand is Acer, Sony, Gateway, IBM, HP, Lenovo and Dell.

The External battery is useful for extending the working hours of the Internal Battery.
[Hardware Hacking General] ridethisbike:
um.... ok.... we all know using an external battery gives you more time. so what is it exactly you are getting at?
[Hardware Hacking General] ronkoni:
well, i was referring to xHausx post..

so the question now is will 2x3.7v connected in series will be able to be charged at 7.4v?
[Hardware Hacking General] xHausx:
Well, if you want to give it a try just make sure you do it outside in case it doesn't work as planned. There is a huge difference between li-ion/li-po and regular alkaline and lead-acid batteries, so be careful.

IMHO your best bet is to just get a proper multicell battery or spare regular one with a charger.
[Hardware Hacking General] ridethisbike:
oh. well either way. i still have faith! :D

in your abilities.... not in god....

+1 which is why i say get the same type of battery (i think the stock one is li-ion, so i've been pushing the use of another li-ion)

the only thing that can go wrong is if he crosses wires. other than that the only issue is how serious is it that each cell gets charged separately. the mAh doesn't get doubled when hooked in series, just the voltage (correct me if i'm wrong), so each cell will feed the other until they even out. so i don't really see it as a HUGE issue. it's just not optimum for the life of the battery
[Hardware Hacking General] ABR23:
been there , doing that

i have been using an 'add on' battery on my mobile for past 2yrs+ ..simply because with the kind of use i do for the smart phone the battery dsnt even last 24hrs.. i used very fine insulated copper wires (those used in motor winding) to tap the point of the internal battery and connected them in parallel to a similar battery on the outside which i glued to the back cover. i used the same brand and model as of the internal battery to avoid chemistry mismatch. works beautifully, i can use a high capacity charger to charge ..both batteries charge and discharge at the same time and give me more that 24hr of operational time. now i can move around without caring to carry battery banks or charging cables.
[Hardware Hacking General] p4pentium4:
I dont think its safe ... as if you will join int and ext batt ... its voltage will be doubled. . And end of day ull brick device ....

In market many power bank covers are available. .. ots safe option for you
[Hardware Hacking General] out386:
If the batteries are connected in parallel, it won't double the potential difference; batteries in series would do that.

Sent from my Ewwphoria using Tatapalk
[Hardware Hacking General] Caserol23:
No, the Board has a limit of power usage that it has, however it some of device with larger mAh will the highest degree of board consumptions that can device perfectly work inside on board and the battery keeping it's energy save or not...

- Official.Caserol23 @ Facebook

- Caserol23 @ XDA

- Caserol23 @ Twitter
[Nexus S General] abundantmind:
This does not mention ICS for the Korean Nexus S. Is that because it's not available or supported, yet? Are these only "official" ROMs?

I've been scanning these pages for an hour, and I cannot find a clear, simple answer to whether or not I can get ICS working on my Korean SHW-M200.

Frustrating.

Why doesn't XDA just offer upgrades as a service? Hell, I'll pay someone 10 bucks to just do it and get it over with, ffs.
[Nexus S General] oldblue910:
No. It isn't available yet.
[Nexus S General] abundantmind:
What I'm trying to find out is if there is an ics ROM that will work on my phone. If I have to wait for KT to issue an official version of ics OTA, then I'll be waiting for another year...possibly forever. Where's the fun in that?

Surely, somebody must be working on this.
[Nexus S General] ljordan2:
Dude, just use those ics roms in the Nexus S development section. Every rom and kernels work on M200 varient.
[Nexus S General] rorio82:
no they don't, E: signature verification fail everytime

edit: still on 2.3.4 can't get beyond it without having to flash cwm, which i dont want to do
[Nexus S General] d3one:
whats ur nexus s model?
[Nexus S General] oldblue910:
I have updated the original post with some new notes and also added the 2.3.6/GRK39F fastboot images for M200.
[Nexus S General] iGELig:
Is is possible to flash another Stock ROM to get ICS?

Is there a tutorial for getting ICS to the M200? I just installed CyanogenMod 9 on my German Galaxy S and it was a piece of cake compared to the SHW-M200 :(

I tried to follow this guide, but when I try to flash the herring.img (step 5), I just get an Android standing before a big warning sign. :confused:

$ ./fastboot flash recovery ~/Downloads/recovery-clockwork-herring.img
< waiting for device >
[Nexus S General] savantist:
but unfortunately, you can use i9020/i9023 ICS package in M200 without any problems at all... :)