Was wondering if you have found a good external battery pack for the PMD 660. Here are a couple of 5V rechargeable Lithium Ion battery packs that I found online.
http://focuscamera.com/focuscamerastore.asp?product=964589255&feeddate=06_01_2007 Quick Charge- Around 90 Minutes, $99, doesn't say how many Watt hours of output is has, however, this unit is on back order. I am going to probably buy the one below or there is a 6V model as well. I guess if Doug Oade has said that it will handle a 6V input then, maybe I will get the 6V
http://www.bixnet.com/mumiexbapaki1.html $99 Key Features:
High capacity. Most Digital Cameras/Video Camcorder's standard batteries only have 5Wh~10Wh capacity. This battery has
44Wh (Watt-Hour) capacity. For reference, an AA battery has about 2.7Wh capacity (1.8Ah at 1.5V). This may help calculating your expected run time.
Ultra light weight design.
Compatible with
Devices which require 5V, 8.4V or 11V power supply, such as network routers, BiX Pocketsize USB or Firewire hard drives, BiX Slim USB or Firewire Optical Drives.
Compatible with following Cameras/video cameras: Sony, JVC, Panasonic, Fuji, Olympus, Nikon, Casio, Kodak, HP, Minolta.....
as well as most cameras or devices which require 5 to 12 volt power supply.
No memory effect. Can be recharged at any time regardless of the amount of discharge.
Built-in batery gauge which displays power level of the battery pack.
AC quick charger included. Temperature and over-voltage/current protection.
Universal camera cable included. Compatible with most all digital cameras/video cameras or equipment.
Can also be used as an external power supply for any device such as portable Radio, CD/VCD/ DVD player etc...which requires 5 to 12 volt power input.