A Nikon Coolpix A10 camera (2xAA batteries) I use for work. Inexpensive, versatile, and fairly rugged. Uses any rechargeable or (cough) alkaline in a pinch. : r/AAMasterRace
Nikon CoolPix A10 Battery & Charger
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Amazon.com: Synergy Digital Camera Battery, Works with Nikon Coolpix S6100 Digital Camera, (Li-Ion, 3.7V, 1050 mAh) Ultra Hi-Capacity, Compatible with Nikon EN-EL12 Battery : Electronics