Duracell silver oxide button batteries have a 4 year guarantee in storage, so you can be confident these batteries will be ready when you need them. They offer long-lasting power for your specialty devices such as watches, calculators and medical devices. Duracell silver oxide button batteries are crafted and infused with triple corrosion protection for battery power you can count on. And you can be assured that they’re batteries you can trust because duracell is the #1 trusted battery brand battery features duracell's 303/357 silver oxide button batteries provide reliable, long lasting power for your electronics and more. Long lasting power: duracell coin batteries are engineered for long lasting performance. Guaranteed for 4 years in storage: duracell silver oxide button batteries are guaranteed for 4 years in storage. This duracell 303/357 silver oxide button battery is equivalent to sr44, sr44w, epx76, sr44sw, 303, 357, d303/357, v303, v357, sr1154