are the longest lasting rechargable AAs I've found. At only $15 a pack, it pays to have 3 packs, IMHO. Since it's rechargable, that in itial $45 investment is all you'll ever pay for them (at least, for a very, very long time).
As to usage...well, we just got back from our vacation. I don't use flash (I HATE what it does to pictures....oh, yeah, and it eats up battery about 10x as fast as not), and DO use the LCD. Took something like 100 photos a day or so, along with the typical TON of possible shot line-ups and extra shots I didn't keep. Anyway, batteries lasted me a couple days per set.
(Or, from here
for $12.99 - but I've not ordered from this vendor before)