With regard to the NiteRider Minewt 700 Dual does this mean one light can be on whilst the other is off?

According to CatEye"Unfortunately most wireless, RF-technology bike computers (like the Strada Wireless) can not be used in conjunction with HID or similar high-power lights, as the lights generate too strong a field of electrical interference for the computer to consistently pick up the wireless RF signal."

Is it possible to mount one light on the bars and one light on my helmet if I buy a helmet mount pack and extra battery?

What is the size, mounting and weight of this battery. Could you provide a picture please.

does the smart charger supplied only work in UK power outlets or does it come with adapters to enable use in Australia?

Someone else mentioned in the Q&A section that the battery pack is 80 x 40 x 40 mm in size.

This is incorrect. I believe that was the old size; the new size is 115 x 40 x 40 which is....well....huge! Doesn't look pretty, sitting underneath the top bar unfortunately.

The new system has high medium and low beam, as well as flashing, compared with high low and flashing of the old system. Unfortunately, the new battery is about twice as long and much heavier. As a result the new battery cannot be placed under the stem, and must go under the top tube.