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I thought I'd start a new thread so it would be easy to find and be more easily searchable. So far the Quantum alkaline AA's are looking very good; 2.2 Ah for the Quantum versus 1.2 Ah for a Panasonic AA at a heavy drain (SM transmitter) of 400 mAh. That's an 83% improvement. (!) The second run is at 500 mAh and I got 2 Ah. This is an SM drain toward the end of the battery life. Pretty impressive. I still have to run the Panasonic at 500 mAh but it will probably only make 1 Ah. Adding to my original post, the Panasonic at 500 mAh made 1.1 Ah while the Quantum made 2.0 Ah for an 82% advantage again. It looks like the Quantum claims are very real. In an SM at 100 mW, the Panasonics ran for 97 minutes until the SM shutdown. The Quantums ran for 175 minutes. This is an advantage of 80%, in line with the precision battery load. I hope Duracell doesn't go nuts with the pricing. Best Regards, Larry Fisher Lectrosonics