Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worked once and now iPod won't hold a charge

The Turbo Charge only worked once and worked well for that one time. It charged my iPod to about 1/4 of its normal capacity. It didn't work after that (it just kept saying it was charging for hours on end) so I switched out new battery after new battery. It still won't charge the iPod. If that were the only problem I wouldn't have minded too much. However, now my iPod won't hold a charge when I plug it into my computer. I charged it yesterday with my computer and got to listen to an album and a half before it died. I just plugged it back into my computer and the iPod just kept restarting and finally began charging after a few minutes of just rebooting over and over. I would not only recommend not using this product but I would seriously warn people to not use it because it might actually ruin your iPod.