Relationship between remaining battery voltage and its percentage
Type of battery
1.2V Rechargeable battery
1.5V Heavy duty
1.5V Alkaline
3.0V
6.0V
9.0V Heavy duty
9.0V Alkaline
12.0V
30
0%
0.90V
1.14V
2.00V
3.58V
7.50V
6.00V
100%
1.29V
1.50V
3.00V
6.00V
9.00V
11.90V