instead of fat-batts or mods.... ???

[plarkinjr]

Has anyone ever thought of using a 5v Passthru with a belt/pocket/rucksack-mounted battery pack? Gives new meaning to the term "Camelback".

Imagine what this could do:
eForChina - Super Rechargeable Li-ion Battery, 12V 9800mAh, USB Output: 5V DC 13000mAh

Or even just a flashlight that runs on 2xCR123A or 18650 with an USB output similar to this (it only has 500ma output, would need more).
1W LED Rechargeable Flashlight with USB mobile phone Charger products, buy 1W LED Rechargeable Flashlight with USB mobile phone Charger products from alibaba.com

 

[GrannyM]

You could get a kensington power pack Amazon.com: Kensington Portable Power Pack for Mobile Devices (K38021US): Electronics

 

[Morandir835]

Know alot of people who have Plarkinjr sir. The being tied down to a cord always comes up as the lone draw back...

 

[Tennovan]

I have a charger for my mod batteries that has a USB output. When on the go, you simply pop in a battery like an 18650 and then switch it to USB mode. Unfortunately it only provides 500mA I think... but its small enough that if it were 2A, I wouldn't feel that weird carrying it around hooked to a PT.