Probook Ultrabay Battery (DIY)

Crazy idea! I have Probook 6360b and I also have ThinkPad Ultrabay battery (43R8891, 10.8V, 2.7Ah) lying around. I'm wondering if it is possible to mod ultrabay battery to work with Probook?

6360b doesn't have any connectors for battery in optical drive slot. However it has a connector for second battery in the bottom. You can put there HP ST09 (11.1V, 6.6Ah) or BB09 (11.25V, 8.85Ah) extra battery. I tested to put ultrabay battery in the optical drive slot and it fit! There was even room for some wiring. So can I just connect ultrabay battery with wires to the connector in the bottom?

 

@Flash-A-Holic if your HP is made with smart batteries in mind, it will probably be misrecognized and won't work. Why would you even bother, given tiny capacity it has? Consider getting a second mains battery instead - it should be cheap and weight less than bottom-attaching batteries.

 

Well I just have Ultrabay battery with no use. Actually I don't need much more battery life just a little bit. So was thinking why not to try.

You think that it will not work? If I choose to try anyway do you think that it is safe? Can I damage my laptop?

 

@Flash-A-Holic I believe it is unlikely you will damage your laptop if you study schematics first and match the contacts correctly... Still, too messy for what you get - an extra 2.5" slot sounds much more reasonable, and you could sell that battery to invest in slate, or additional mains, compatible battery.

 

@Starlight5 I already have 2.5" caddy but I don't need extra storage. 250Gb SSD is enought for me. Also I don't want make the dimensions any bigger by buying "slate" battery or 9/12 cell battery. Second normal battery would be option but then I need to turn off computer when changing it. No go for me.

I'm trying to find out which is positive (+) and negative (-) connector on 6360b. Any help here?
6360b Mainboard:

Spoiler

http://laptopmainboard.com/images/mid/hp-641734-001.jpg

 

Can anyone tell from these pictures which is positive and negative thermal?

Spoiler

BB09


ST09

EDIT: I might have figured this out. Check out these two pictures:

Spoiler

ST09

If you look closely you can see that two of the pins are higher than the others. If you look at the 6360b mainboard you can see that the higher pins are NEGATIVE thermal. Can someone confirm this?

So the correct order is this(?):

 

So I have now found out the PINOUT for these devices:
Ultrabay battery:

• || ||||| = [+] [+] [gap] [SCL = serial clock] [SDA = serial data] [unknown] [GND] [GND] (source)

Probook 6360b:

• |||||||| = [+] [+] [Data or Clock] [Data or Clock] [NC = Not Connected] [Temp] [GND] [GND] (source (video))

So the wiring should be something like this:

I have two questions:

1. How to detect which pin is for Data and which is Clock on Probook?
2. Do I need to connect Temp at all? Only place for it would be "Unknow".