External Power Supply for Sound Device 702

["David Secomb" dsecomb2]

Hi

I recently purchased a Sound Device 702. I would like to record at times up
to 18 hour running 2 mics using phantom. I understand the 702 can be powere=
d
by an external battery using the Hirose connection.

I'm sure it's possible to make a cable  but is there a commercial cable
available to connect to a suitable battery?

What size battery is needed? Does the battery need to power the recorder at
Message: 7.
Subject: 2v (as the power pack) or 12v ( as alternate power supply at home- 
240v).
My understanding is the Hirose connector has 4 pins. 2 powers the unit, the
other 2 supply power to power pack. Having all 4 pins wired would power bot=
h
recorder and power pack, requiring 12v. Wiring to correct 2 pins just to ru=
n
the recorder requires 7.2v. 

Any advise would much be appreciated.

Cheers

David