So I have quite a few ideas for wearable devices using Arduino boards (mainly the Nano and the Micro clones). With that in mind, I want to determine what the best way to power an Arduino is, with compactness in mind (and cost too, of course). One single button cell battery does not supply enough power to the Arduino to power it properly. I can use these 2x button cell battery holders (6v) but they mainly ship only from China and, for some reason, are relatively expensive ($15 for 6 of them).
Does anyone know of a better and cheaper way of powering these Arduino boards, with wear-ability in mind?