Ok I didn't tell the whole truth, I didn't get a 6 pack for myself but I did get a 4 pack for the wife & my Eurotek Pro's. I was at Lowes today and they had a sale on a 4 pack of Rayovac 9 volt alkaline batteries. They normally are $9.97 and were on sale for $4.00 Just thought that I would run this by you all that use 9 volt batteries for your detectors, it's a good price and I have had good luck using Rayovac's.