1 of 2 people found the following review helpful
Buy the Belkin iPod 4xAA Battery power pack instead...,
This review is from: Belkin TunePower Rechargeable Battery Pack (Electronics)
Sounds like this is a limited use product. Buy the Belkin battery back up pack (from amazon) instead - put 4 AA batteries (rechargeable or alkaline) in it and plug it in to your ipod. Job done - 20 hours extra playing time and it tells you how much 'go' is left in your batteries anytime you ask it.
I've just bought one to go travelling with and I'm well pleased with it!!