This listing is for a brand-new Sony 364 (SR621SW) silver oxide watch battery pack. These batteries are ideal for wristwatches and other small electronic devices that require stable and long-lasting power. 🔋 Product Details: • Brand: Sony • Battery Type: Silver Oxide • Model Number: 364 / SR621SW • Voltage: 1.55V • Mercury Free: Yes (0% Mercury) • Condition: New, sealed in original packaging • Quantity: 5 batteries (as shown in photos) ⌚ Compatibility: Compatible with watches and devices that use: • 364 • SR621SW • SR621 • AG1 (verify before purchase)