Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Batteries die quickly - even after 4 units!!!!

I have purchase this unit 4 times hoping to get one where the rechargeable batteries would last more 30 minutes with my nano. I have sent each one back and got a replacement. Each one did the same thing. The first charge would last for 8 hrs. Then on the next charge, the batteries would last maybe 30 minutes at most. Once again I will send this 4th unit back. I am done playing now with this Logitech product. By the way, I called Logitech's product support line to get help (a non-toll free number) and after listening to their distorted background music for 10 minutes without anyone coming on line to help, I hung up. I high suggest looking at another set of speakers.