

Bought this for 30 dollars at wal-mart. It holds a 1000mah hour charge; so using your passthough should last a person a total day with one charge. If you wanted to make your PCC charge batteries longer this is also handy to have on you.
It charges up with Mini USB.
Duracell DR7000LI Instant Power Charger for USB Devices at TigerDirect.com
Found it at Tiger Direct for 19.99USD
Video
YouTube - Duracell Slim Battery Li-lon-Works for Titan Passthough, and PCC