I usually will use AA rechargeable batteries in most everything using that size with good results. But I started wondering if the added .6 volt of 2 alkalines would benefit the C Crane Skywave radio I just ordered. If there are no comments perhaps I will do some testing. The Skywave only uses two AA so 3 volts vs 2.4 and in radios like the Tecsum 660 would be getting 6 volts vs 4.8. Does that extra power have any noticeable benefit? Perhaps the audio quality may improve with more power for amp headroom? Obviously I am killing time as I wait for my Skywave to arrive.