Retailer Of Current Sensor, Power Adapter, Rocker Switch, DC Motor, 18650 3.7V 2 battery holder hard plastic case with wire 1 (3.7V x 2 battery = 7.4Volt), 18650 3.7V 1 Battery holder plastic case with wire 1 (1 x 3.7V = 3.7Volt), AAA 2 Cell Battery Hard Plastic Case with Wire Pack of 1, AA 1 cell battery holder hard plastic case with wire 1 (1 x 1.5V = 1.5Volt), AA 2 cell battery holder hard plastic case with wire 1 (1.5V x 2 cells = 3Volt), AA 3 cell battery holder hard plastic case with wire 1 (1.5V x 3 cells = 4.5Volt), AA 4 cell battery holder hard plastic case with wire 1 (1.5V x 4 cells = 6Volt), AA 2 cell battery holder hard plastic slide open cover case (2 x 1.5V = 3Volt), AA 4 cell battery holder hard plastic cover case with on-off switch and alligator clip 1 (4, Single 9V battery holder hard plastic case with on / off switch and wire 1 (1 x 9V = 9volt), 3032 3V through Hole PCB Mount Single Battery Holder Plastic Case.