"10-year long-life battery, specially developed for smoke detectors, 9V PP3 (6LR61 style).
ANSMANN premium quality lithium battery long-life, specially developed for use in smoke detectorsfor all conventional, battery-operated smoke detectorstested by the Saarland TÜV centre (function, quality, durability)up to 700% more power in comparison with an alkaline batterymercury and cadmium freecan be stored: 10 years minimumcan also be used in extreme temperatures from +60°C to -40°Cthe smoke detector batteries are around 35% lighter than normal alkaline 9V PP3 batteriesvery low self-discharge, only ca.
2% per year"