Battery-powered apparatus (10) for holding and energizing an electric transducer (12) comprises a transducer mount (17), a hand-held battery housing (16) carrying the transducer mount, and first and second internal battery terminal contacts (18, 19). A first external battery charge terminal (23) is on the transducer mount, and a second external battery charge terminal (24) is on a part of the battery housing, such as its end cap (32). A double-throw switch (26) has a common element (27) electrically connected to an internal battery terminal contact (19), has a first switched contact (28) leading to a first terminal of the electric transducer (12), and has an opposite second switched contact (29) electrically connected to an external battery charge terminal (24). If there are two electric transducers, they may be part of a light source comprising a reflector (36), a first electric lamp (12) having a filament (112) at its focal point, and a second electric lamp (13) extending into that reflector beside the first electric lamp.