My first right-angle drill was a small corded model that other carpenters were always asking to borrow. It solved a multitude of problems and was the tool of choice when I was in a bind. But in recent months two new right-angle tools have replaced that drill in my affections: a drill/driver from Milwaukee and an impact driver from Hitachi. Both are cordless and take lithium-ion batteries. They are small and light, and because of their configuration I can use them in places where other drivers won't fit.
Milwaukee 2415-21 Milwaukee's right-angle drill/driver was introduced last September and is part of the company's M12 system. It has a 3/8-inch ratcheting keyless chuck, a battery gauge, an LED light, and a large paddle-style variable-speed trigger.
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