2 x CR2032 Coin Cell Battery Box w/ On-Off Switch & Plain Wires : ID 4988 : $1.50 : Adafruit Industries, Unique & fun DIY electronics and kits
Classification of Cells or Batteries
Draw the schematic diagram of an electric circuit consisting of a battery of two cells of 1.5V each, three resistances of 5-ohm, 10 ohm and 15 ohms respectively and a plug key