i just got my cd 2x2 this week and have really test it out yesterday on my event job. i noticed my batteries in my 580ex dry up really fast even the cd 2x2 is using as well. i wonder even we have the CD 2x2 plugin to the flash and the flash will suck the AA batteries inside as well?
i thought...
since u have sell many of them, is there any photographer have ask for replacement of the batteries?
from your quote "around 150SGD" it seem u have not sell any replacement batteries because u cant give an actual cost of the replacement battery.