Bought one of these low cost Grundigs from Radio Shack some time ago, not a bad idea for a bugout kit but the rechargable battery it uses is a Nicad that a cordless phone uses. I found after about a year that it wouldnt take much of a charge.....Need to get a replacement battery or perhaps a whole new unit.
I also bought a Hand Crank Philips awhile ago model AE1000, I cranked it up for a few minutes in the September and the damned thing is still running on one charge. Thats based on turning it on and listening to it for a few minutes every now and again as well as leaving it on for about 8 hours to listen to the Greycup. I would highly recommend it except its only AM/FM, it doesnt include SW.
I am starting to look at backing up these hand crank devices with Lithium AA batteries in case the internal rechargable batteries fail.