You're right, more details may help.
After disassembled the EP500, you'll see that the BMS board is separated from the battery, there is a gap between both, and the thermal protection fill this gap.

Is this enough ?

So which is best now?

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Hi,

Need to change the battery in my daughter's X10 mini. I see that X10 mini pro and X8 batteries now work, which is best for capacity and safest?

(I see that Li-poly batteries can explode if you puncture them etc, don't fancy that)

Thanks for all your extensive help

For anyone else doing this:

I tried the EP500, but it was a very tight squeeze, no matter how much I tried, the back wouldn't quite properly snap on. May have been a different manufacturer to the other that was tried.

In the end I got a mini pro battery, soldered the connections on and seems fine (it's obviously the battery that is meant for it)

samsung battery?

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Originally Posted by SoftwareFailure

Warning : this mod is hazardous as there is no more space and in case of battery failure it may lead to the destruction of the phone.

A. Disassemble the EP500 battery (same way as Gx3)


B. Remove the original mini battery from its metallic frame and cut the 3 wires from their solder


C. Preparation of the EP500 battery

1. Remove the coating on those tracks
2. Cut the thermal protection and bent it so that it's become flat
3. Resolder the thermal protection
4. Tin the prepared tracks and positive pole of the battery
5. Solder the 3 wires of the battery connector
6 & 7. Insulate the whole BMS board (both sides) using tape
8. Cut a window in the tape to let the thermal protection be in contact with the body of the battery
9. Press the BMS against the battery


D. Insert the EP500 inside the metallic frame


E. Finished !

why appears on the last pics samsung?

Hi,

Probably because Samsung is supplying lot of components (LCD panels, SoCs, batteries) for many manufacturers ?
The battery I used was an official EP500 (from SE) battery and I wasn't surprised to see that the battery itself was made by Samsung, this is quite common...

Gx3,

It's been several months since your original post, and I'm just wondering if you continued to use the 1200mAh replacement battery and whether it was free of any problems. I found what seems like it may be the same battery on ebay and considering using it as a replacement, as my X10 Mini's battery has rather suddenly died.

With no word from Gx3 (original poster) I went ahead and ordered what looked to be the exact same battery from Amazon.de (Germany) for 5€ (US$ 6.25). The one I received was slightly different (see attached photo) but seems to be working fine.



My original battery was totally dead (a rather sudden death which I believe *may* be connected to a in the CM7 2.2.0 ROM with tethering and/or USB charging) so I was able to use its cable and connector to make the replacement battery. I de-soldered the cable from the original battery, extended the positive (red) cable slightly, trimmed the black (negative) and finally soldered the modified cable into place on the new battery similar to the way Gx3 did. However, because the original cable is quite short, I laid the cable the same direction as the original battery (toward the corner closest to the contacts) which is opposite of what Gx3 did in his original post.

By peeling the sticker covering off the new battery carefully, I was able to re-use part of it once the cable was soldering into place to help insulate the metal of the battery case from the rest of the phone. I suggest making sure the battery is fully insulated before putting it anywhere near the phone. I didn't do so when testing the placement of the battery and cable in the phone and experienced a brief short, but fortunately nothing serious.

Due to the nature of this "project" it's not something I recommend to anyone who hasn't used a soldering iron before, as Gx3 also suggested. Taking apart Li-ion batteries is a risky business, as is using the final battery in your phone. I kept the phone in a ceramic bowl for it's first charge cycle and still now on it's first discharge cycle (streaming internet radio), and I'll keep it in the bowl again for the next charge cycle at least.

Awesome work, this will prolong the life of my mini for sure! I encourage more of the bst-38 option, but I have a question:
Where can I get the original battery terminal? I don't want to use the existing terminal (for case something goes wrong)
I think maybe a replacement is common in other electronic products. Does anyone know?
Sorry for my bad english and thank you all again for this this great tutorial.

help

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hi friend
thank you for your tutorial
I followed your step by step lesson
but there is one problem occured
my charger not charge but drains the battery
any saggestion please
anyone please help
my charger drains the battery

BXT 2100 mAh

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I just bought this battery, I hope it fits:



Does anyone have any reference of his performance? When get it I will post the results, I think that will be in about 20 days.

Meanwhile I rooted and updated to 2.1 and curiously my battery now lasts much longer than before!
The difference is too noticeable. Before rarely finished the day with some charge, and now I have 3 days (with little use) and I still have 30%.
Does anyone comes up with some explanation?