The FinePower 9V alkaline battery (6LR61) features a 9 V voltage. These power cells are suitable for smoke detectors, toys, radios, and similar devices with high power consumption. The battery maintains performance in cold temperatures down to -18 °C and withstands operation in heat up to +50 °C. The FinePower 9V (6LR61) pack includes 4 blister-packed power cells. The batteries have a capacity of 500 mAh and deliver stable voltage until completely discharged. The alkaline power cells contain no cadmium or mercury.