That AA batteries are standardized makes them more readily accessible, helps drive down their price through competition and economies of scale, and thus makes the AA battery more valuable.

比如说双a电池的标准化使得它更容易被买到，而且竞争和规模效应使得产品价格下降，从而使得双a电池的效用更高。

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The AN/PVS-14 operates on a single AA battery and comes equipped with ITT's thin-filmed proprietary Generation 3 Pinnacle image intensifier tube.

AN/PVS-14采用单节AA电池，并配备了ITT公司专有的薄膜第三代品尼高影像增强管，可用光探测能力提高了10倍以上。

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The iMainGo 2 model runs on four AA batteries, while the iMainGo X uses a rechargeable lithium-ion battery.

IMainGo2通过4颗AA电池运作，iMainGo X使用的是充电锂电池。

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The deadbolt is battery-powered using four AA cells that last more than a year with normal operation.

ENGADGET

Just 12.2mm slim (measurement excludes lens cover), which is smaller than the thickness of a standard AA-size battery, the Cyber-shot TX55 is the world's thinnest camera in its class (among cameras with an optical anti-shake function).

ENGADGET: Sony Cyber-shot TX55 packs 16.2-megapixel sensor, promises 'extremely low' noise in dim light

Battery life is rated at 35 hours--impressive, given that is uses only a single AA battery.

FORBES: Rio, Redesigned