We’ve got battery holders for all sorts of needs and projects! Waterproof? Here ya go. With an on/off switch? Easy peasy. Here’s our latest addition in classy Adafruit black: 2 x AA Battery Holder with Premium Header Wires. What’s so special about ’em? Well you can plug them right into a breadboard! No need to fight with those skinny stripped wires you normally get. Of course, you can always still solder them into a PCB.
Use with any alkaline or rechargeable batteries for about 2.5V to 3V output.