These are the commonly used battery configuration, voltages usually at 150mA-300mA:
2 batteries, total of 3V: AAA, AA, C, D and N
3 batteries, total of 4.5V: AAA, AA, C, D and N
4 batteries, total of 6.0V: AAA, AA, C, D and N
5 batteries, total of 7.5V: AAA, AA, C, D and N
6 batteries, total of 9.0V: AAA, AA, C, D and N
1 battery, total of 9.0V, 9V with top clip
8 batteries, total of 12.0V: AAA, AA, C, D and N
