Home Depot has packs of 48 Alkaline batteries - 24 AA and 24 AAA - for $7.88. That works out to under 17 cents per battery. I just searched for "historic" alkaline battery prices and pulled up a 1998 comparative analysis of rechargeable and non-rechargeable battery costs, and see that alkaline AA and AAA batteries cost 65 to 75 cents each in 1998 in packs of 4, so the price is down by more than 75%. How much did we used to pay for so-called dry cells in the 1970s, when Radio Shack had its Battery of the Month Club? Weren't the zinc carbon batteries around 20 to 30 cents each? And how much better are these batteries? What is the rule of thumb ratio of Alkaline versus zinc carbon cell longevity? Three times? Four times? That means we are paying less than a tenth as much in constant dollars for battery powering. Good deal for us! And that doesn't even figure in that CMOS components use less power than did discrete transistor and TTL circuitry.