Battery Voltage Tables 1. NP-F-Type Lithium-Ion Battery (Nominal voltage: 7.4 V) Voltage (V) Approx. Remaining Capacity 8.4 V 100 % (Fully charged) 8.2 V 90 % 8.0 V 80 % 7.8 V 70 % 7.6 V 60 % 7.4 V 50 % 7.2 V 40 % 7.0 V 30 % 6.8 V 20 % 6.6 V 10 % ≤ 6.4 V Battery nearly depleted — recharge recommended 2. Six AA Alkaline Batteries (Nominal combined voltage: 9.0 V) Voltage (V) Approx. Remaining Capacity 9.3 V 100 % (Fresh batteries) 9.0 V 90 % 8.7 V 80 % 8.4 V 70 % 8.1 V 60 % 7.8 V 50 % 7.5 V 40 % 7.2 V 30 % 6.9 V 20 % 6.6 V 10 % ≤ 6.3 V Batteries depleted — replace soon 3. Six AA Ni-MH Rechargeable Batteries (Nominal combined voltage: 7.2 V) Voltage (V) Approx. Remaining Capacity 8.4 V 100 % (Fully charged) 8.2 V 90 % 8.0 V 80 % 7.8 V 70 % 7.6 V 60 % 7.4 V 50 % 7.2 V 40 % 7.0 V 30 % 6.8 V 20 % 6.6 V 10 % ≤ 6.4 V Recharge required