I guiess it's possible. I broke my lens cable and lost a bunch of contacts. Can't find a replace part. planning to copy that FPC and order some on jlcpcb, but way too lazy, and years passed now.

done. please check inserted step3 below.

Locking machenism of this FPC connector is quite uncommon, I will upload some more photos to show you the details.

No idea. I broke 2 FPC and lost some lens contact springs, got no where to buy, planning to replace the FPCs, but too busy these days .........

Sorry, my screen died shortly after writing this guide :( ... It's just an old machine, can't even run firefox now...

hmm, not quite sure, been a long time. seemingly just 3-4 screws holding it. But the process involves the speed light.

Actually, paralleling batteries. Does not necessarily require them to be same capacity (if within reasonable range, e.g. 1Ah + 3Ah, is ok, 500mAh + 100Ah, probably not). But requires them be same voltage spec, 4.35V // 4.35V is ok, 4.35V // 4.25V is not good.

want to test power? just find big capacitors.

As I measured, it smells like M1.7x0.35*4.5mm CM head. you can get away with M1.6x0.35x4.5 as they share same pitch 0.35mm, length 4.0 should also be ok.

I'm not quite sure, I sticks very tight. possibly glued or even moulded together