Well Ken, I use alkalines in my 'Hawkeye' (UK version of the deleon) and I have to say I am really impressed with them. I still have the original set in the machine, and only 2 blocks off the battery meter have gone. Taking into account that I have used the machine for around 15 hours, this is impressive! It will be interesting to see how fast they 'drop off' now, but at the moment they are still going strong! My local store was doing a deal on Duracells, a pack of 8 for the price of 4!!! so I've stocked up on this deal, and have 12 packs!. At this rate, they should keep me detecting for at least 2 years <img src="/metal/html/lol.gif" border=0 width=15 height=15 alt=":lol"> HH charlie(UK)