Batteries Netvox sensors are low powered devices run on batteries. Typical battery life can be up to 5 years. AA Battery Standard 1.5V Alkaline BatteryRRP: £0.43+VATAfga CR2450 Litihuim Button Cell 3V BatteryRRP: £1.99+VATSaft ER14505 Litihuim 3.6v AA BatteryRRP: £3.99+VATD Type 3.6V Lithium Battery RRP: £12.36 +VAT