I have just joined audible and have started downloading audio books. However, when I listened to one for the first time the other night I found the batteries drained much faster. Is that normal? How do others deal with it if it is? I was going on a car trip and wanted to take the Axim to listen in the car, but the battery drains I'm not sure it's worth it . . .

(And no, I don't have a spare battery)