Sony Lithium Batteries are used Ideal for keyless entry, toys & games, watches, LED lights, heart rate monitors, glucose monitors, calculators, pet collars and bathroom scales. Sony is one of the leading providers of lithium micro batteries that power a broad range of electronics globally. The batteries provide excellent stability for electronics while being lightweight and still having high energy output of 3 volts, almost double that of conventional batteries. Voltage remains stable even for long periods of discharge, which improves the reliability of equipment that use the battery. Superb characteristics over a wide temperature range of -30 to +70 degrees C. Battery construction ensures maximum leakage resistance over a long span of time. Batteries utilize Sony's sealed innovative technology to minimize battery self-discharge. Warning: Keep batteries away from children. If infant happens to swallow batteries, consult a doctor immediately. Never charge batteries. Charging batteries may cause battery electrolyte to seethe or battery internal pressure to rise. Leakage, heating, explosion or ignition of batteries may result. Do not heat or dispose of batteries in fire. Do not modify nor disassemble batteries. This may damage gaskets, and may cause ignition, heating, leakage or explosion. Insert batteries (+) (-) correctly. Erroneous insertion of batteries may result in battery short-circuiting depending on types of devices. Leakage, heating, explosion or ignition of batteries may result. In case of eye contact with battery electrolyte, immediately flush eyes thoroughly with water, do not rub the eyes, and consult a doctor. In case battery electrolyte comes into contact with the mouth, gargle and rinse thoroughly and consult a doctor immediately. Do not connect (+) and (-) of batteries by wire. Do not carry nor store batteries with metallic necklace or hairpin.