The FinePower Ultra lithium battery with a capacity of 220 mAh is suitable for smoke detectors, toys, radios, or other small appliances. Its voltage is 3 V, which should be taken into account when installing the battery into a device. FinePower Ultra lithium CR batteries are supplied in a blister pack containing 10 pieces. They can be used at temperatures from -18 to 50 °C. The recommended storage temperature is no more than 30 °C. The batteries do not contain mercury or cadmium, so they are safe for humans and the environment.