I am wondering what kind of AA batteries MX Sport users or any other brand find are best. I currently run 1.5V AA NUON alkaline batteries. I understand that for maximum performance 1.5V alkaline are best. I have read on line that using rechargeable batteries tend to only be 1.2V and are not optimal. Any suggestions on switching to a rechargeable and what kind since there are a couple different kinds and/or makes of rechargeable batteries. I can't even find a proper rechargeable 1.5V and I can't seem to get an answer if they make rechargeable alkaline which would be my choice.