A single high quality alkaline 9V PP3 battery in blister pack. As used in smoke alarms and many children's toys. This Varta High Energy alkaline 9V battery is ideal for high drain devices such as smoke alarms, walkie talkies and motion detectors. These most powerful Alkaline batteries Varta produce, are perfect for users of high drain devices which may include wireless mice, high drain toys and flashlights. Features and Benefits Although there are designed primarily for power hungry devices, they will replace any 1.2V or 1.5V AAA battery in compatible devices. Varta offer a 10 year storage guarantee with this 4 pack and report that these cells produce 45% more power than their basic 'simply alkaline' AAA battery.