4 hours is what I regard as an acceptable length of time when using disposable AA batteries. But we have to remember this amount of battery life each of us expects is with the understanding of “Your Results may Vary”. What I listen to determines how long I get on a set of batteries. If the agencies I listen to are relatively quiet in comparison to what others listen to, my battery consumption is less. So, there’s that. There are rechargable AA batteries available and depending upon how many disposable batterie's you go through it may a way to save money in the long run. I use a lithium rechargable AA battery called TENAVOLTS (Amazon). My results using them have been better than the disposables. They come 4 batteries with a charger. (I was using the Eveready Lithium disposable AA batteries which lasted much longer than the regular AA disposables but are very expensive.) My hopes were that the TENAVOLTS would give me the same longer playing times as the Eveready disposable lithium batteries and although I haven’t compared them as yet I believe the TENAVOLTS rechargables last longer than the alkaline disposables and at least approach the length of time the Eveready lithium disposables do.
