Choose Renata, their professional expertise is worth having on your side. And in your watches. * Chemical system zinc / monovalent silver oxide, low drain * Nominal voltage 1.55V * Capacity 24mAh, discharge over 34.8kW at +20°C to 1.2V * Operating temperature 0°C to +60°C * Self discharge less than 5% per year at +20°C * Weight 0.40g