you have a camera this small, you've gotta have a proprietary battery.
Casio uses one called the NP-20, which seems familiar for some reason.
This 2.3 Watt/hour battery will get you about 80 minutes of juice
per charge, according to Casio.
Pros: The ultimate small camera -- it's just plain cool!, Robust operation, Built-in memory plus a SD/MMC slot, Decent photo quality for a tiny camera, Many controls, even manual white balance, Handy dock for photo transfer / battery charging
Cons: No optical zoom (can't see how they'd do it), No sound recording on EX-S1 model (get the EX-M1 for that), No macro mode, No tripod mount, Buttons on top of camera plus the four-way switch need a redesign, Pricey
Excerpt: 1. Introduction I've always been interested in photography throughout most of my life. Last year I switched from using a traditional SLR camera to a digital camera with the Canon G1. However, the G1 presented a small problem for me.
Summary: Casio's EXILIM EX-S1 is the smallest, thinnest and lightest (as of 7/02) digital camera in the world. The all-metal body measures only 11.3 mm thick, 88 mm wide x 55 mm high and weighing a mere 86 g, excluding the battery and memory card.