The CR2032 button cell holder is a perfect way of powering those tiny wearables controlled with Arduino. They provide room for 2x CR2032 batteries connected in series to provide a nominal output voltage of 6V (2*3V batteries).
The holder is made of a clear plastic, and includes a power switch to turn your device on or off. The connection wires come pre-trimmed and tinned for convenient soldering.
The holder works with both CR2032 batteries or LIR2032 (the lithium rechargable version of CR2032).