I have a $ony PCG-F707 Notebook with a mob 500/600MHz P3 CPU and the PCGA-BP71 14,8V/2600mAh or PCGA-BP72 14,8V/3000mAh. It has a 6 Pin connector, and supplies in addition to the power also information about the Load status and how much the BP has aged in % (charge cycles) It started with a strange behavior that the capacity jumped from somewhere around 87% full after 15minutes uses to 10% depleted from one second to another in a second. Consequently the Notebook did shut down as it's supposed to do on low battery. A colleague proposed a complete depletion by booting into BIOS settings and letting the Notebook turned on until the battery is completely empty. IMHO it's impossible that Li-Batteries just deplete by 70% from one second to another. So it's either that the Li-Batteries have never been charged completely to whatever capacity they had left or the electronic inside the BP is off scale and had has to be recalibrated/reset if possible. Now the BP is always 0 and I have no idea how to reset the electronics. I took the BP apport and found 8 Panasonic Li-Ion-Batteries GR17670HC. a small PCB with XTAL, CPU? (MP-13 1-671-393-15 inside. The case is basically a plastic cover on top and one on the bottom which is held by double-sided tape at the batteries together. So cautiously warming (max 212°Fthe covers could loosen the adhesive force of the tape, while I cracked sides a bit since I used a screw driver That's what I know so far any idea how to resurect a battery pack or use the connecto for an external battery pack.