Promise RAID EX TX 8xxx 16xxx battery rebirth

After 5/6 years, the battery seems dead. For sure, Promise won't help to give a replacement P/N only for the battery.
(origine BYD = Build Buy Your Dreams )==> so DIY
Intro : a little bonus that doesn't really matters : battery status leds on front (sorry for the dust - limiting resistors are already on the stock PCB)
http://forums.majorgeeks.com/attachment.php?attachmentid=155671&d=1300112281
From the beginning I took the battery out of his PCI standoff and replaced the link flat wire to the controler board with a longer one to place it in a cooler location in the box fans airflow (beware this is not std 1/20"-1.27mm HE10, wire and connectors are 1mm pitch!
http://forums.majorgeeks.com/attachment.php?attachmentid=155672&d=1300113192
leds cabling:
http://forums.majorgeeks.com/attachment.php?attachmentid=155673&stc=1&thumb=1&d=1300113633
The replacement battery will be NP120 Li-ion 3V7 ~1700/1900mAh
You will have to cut the left wall of the support case to win ~1mm:
http://forums.majorgeeks.com/attachment.php?attachmentid=155674&stc=1&thumb=1&d=1300113633

 

For the contacts, I destroyed 2 relays with inverter switch to get the blades inside. Prefer the more flexible ones: a single vertical DPDT relay will supply 4 15/20mm long flexible blades.
An old dead GSM could had as well give his organons to the geek science.
I fixed them 3 behind the wall with a clove or a chunk of isolated copper wire/rod (e.g thermo-retractable).
Get the wires and the connector from the dead battery (cut the wires one by one caring not to make any short circuit as some energy could remain in it)
red=+(3V7), yellow=internal temperature probe (10kΩ CTN), blackS=-(0V)
Check you did not short any wire to the rod when soldering them to the blades before inserting the new battery.
http://forums.majorgeeks.com/attachment.php?attachmentid=155719&stc=1&thumb=1&d=1300173422
http://forums.majorgeeks.com/attachment.php?attachmentid=155720&stc=1&thumb=1&d=1300173422