Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nice in theory, good band selection, awful dynamo & battery

I bought this unit from a survival specialty store several years ago. It does have good features in theory -- power options include solar, dynamo, and wall adapter, and it has multiple bands including television audio. The dynamo broke the second time I tried to use it -- GENTLY -- and I am an engineer and not, say, a destructive toddler. I've taken to using it occasionally to listen to TV audio now occasionally in the kitchen, so I didn't throw it away once it was clear to me that it would be near-useless in a significant emergency. Unfortunately, the battery won't hold a charge for more than a few SECONDS now, despite regular full discharges over the years.I'm still trying to find a dynamo-powered emergency radio that inspires significant confidence that it might actually survive even a minor disaster....