Remember those thick C-type batteries you used to toss in your flashlights before the age of LEDs? Well, they're not likely to overtake the disposable battery market anytime soon, but they did just become slightly more useful to a very select number of Japanese MacBook Air owners. The EP-15V from Bird Electron will bridge eight of those C batts to create a 12-volt power source, giving your 11.6-inch MacBook Air a two-hour boost when used with standard alkaline batteries. The charger was released today in Japan, and will initially sell for ¥19,800 (about $250), not including batteries or the requisite