--- product_id: 9442028 title: "387S Low-Drain 1.55V Silver-Oxide Button Cell Battery" brand: "energizer" price: "€ 17.69" currency: EUR in_stock: true category: "Energizer" url: https://www.desertcart.at/products/9442028-387s-low-drain-1-55v-silver-oxide-button-cell-battery store_origin: AT region: Austria --- # 600 hrs endurance 1.55V stable power 11.6mm compact size 387S Low-Drain 1.55V Silver-Oxide Button Cell Battery **Brand:** energizer **Price:** € 17.69 **Availability:** ✅ In Stock ## Summary > ⚡ Power your essentials with precision and endurance — never miss a moment! ## Quick Answers - **What is this?** 387S Low-Drain 1.55V Silver-Oxide Button Cell Battery by energizer - **How much does it cost?** € 17.69 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/9442028-387s-low-drain-1-55v-silver-oxide-button-cell-battery) ## Best For - energizer enthusiasts ## Why This Product - Trusted energizer brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless Replacement:** Direct swap for Rayovac RW51 with guaranteed compatibility - • **Long-Lasting Performance:** Up to 600 hours of dependable power in low-drain gadgets - • **Lifetime Limited Warranty:** Confidence backed by Energizer’s trusted warranty for peace of mind - • **Perfect Fit for Demanding Gear:** Compact 11.6mm diameter and 3.6mm thickness tailored for watches, cameras, and calculators - • **Reliable Silver Oxide Chemistry:** Delivers consistent, high-energy density for your precision devices ## Overview The Energizer 387S is a premium 1.55V silver-oxide button cell battery engineered for low-drain devices like watches, cameras, and calculators. Offering a robust 60mAh capacity and approximately 600 hours of reliable use, its compact 11.6mm size ensures a perfect fit. Trusted for consistent performance and backed by a lifetime limited warranty, it’s the go-to power source for professionals who demand precision and longevity. ## Description Product description Energizer Silver Oxide Watch Battery For Energizer 387 Button Cell desertcart.com Designed for use in continuous, low-drain applications such as photography equipment, pagers, and calculators, Energizer's 387S button cell battery offers endurance and reliability. The 1.55-volt, silver-oxide battery is rated for approximately 600 hours' use, and its average capacity is 60 mAh to 1.3 volts. The battery measures 11.6 mm in diameter (.457 inches) and stands 3.6 mm (.42 inches) thick. This battery replaces the Rayovac model RW51. ## Features - Silver Oxide button cell battery delivers high-energy density, endurance and reliability - Replaces Rayovac RW51 - 1.5 volts and 60mAh - Weighs .01 pounds and is designed especially for use in cameras, calculators, watches and other demanding equipment - Lifetime limited warranty ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00006G9SE | | Amperage | 1.5 A | | Antenna Location | Watch | | Battery Capacity | 60 milliamp_hours | | Battery Cell Type | Silver Oxide | | Best Sellers Rank | #133,531 in Health & Household ( See Top 100 in Health & Household ) #745 in Coin & Button Cell Batteries | | Brand | Energizer | | Customer Reviews | 4.6 4.6 out of 5 stars (436) | | Global Trade Identification Number | 00039800064554 | | Included Components | Battery | | Item Dimensions | 2 x 1 x 0.1 inches | | Item Weight | 9.07 g | | Manufacturer | Energizer | | Model Number | 387S | | Number of Batteries | 1 Product Specific batteries required. (included) | | Reusability | Single Use | | UPC | 039800110916 039800064554 | | Unit Count | 1 Count | | Voltage | 1.55 volts | ## Product Details - **Battery Capacity:** 60 milliamp_hours - **Battery Cell Composition:** Silver Oxide - **Brand:** Energizer - **Number of Batteries:** 1 Product Specific batteries required. (included) - **Recommended Uses For Product:** Watch ## Images ![387S Low-Drain 1.55V Silver-Oxide Button Cell Battery - Image 1](https://m.media-amazon.com/images/I/61XwxhxIe-L.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Is this the correct battery for a Pentax Spotmatic2? Present has no marking.** A: Yes, the energizer 387S is the recommended replacement battery for your camera. "Users of the Spotmatic, Spotmatic II (SPII), Spotmatic IIa, SP500, and SP1000 will be able to replace their batteries with a 1.5volt Silver-Oxide battery". It a on-line order item. You can also use the 1.5v Energizer 389 and you should be able to buy the 389 at local shops. **Q: Has anyone tried this in an asahi pentax sp500?** A: I use this battery in a 1970 Bulova Accutron watch but according to google you can use it in your camera as well. I copied the following from a google query: Buy Energizer 387S Low-Drain 1.55V Silver-Oxide Button Cell Battery on ... It fits my Pentax Spotmatic SP500 film camera perfectly (no O-ring required). **Q: Would this battery work on the Bulova Perfectionist c977745 watch?** A: It worked on my bulova space view (internal tuning fork) watch. Not sure if this will help you, but it might **Q: Would this battery work for a honeywell pentax sp1000?** A: Dont’t know.It also didn’t work in what I ordered it for but too much hassle to return it for is value ## Frequently Bought Together - Energizer 387S Low-Drain 1.55V Silver-Oxide Button Cell Battery - #344 Renata Watch Batteries 2Pcs - Energizer 344 / 350 Silver Oxide Watch 1 Battery --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.at/products/9442028-387s-low-drain-1-55v-silver-oxide-button-cell-battery](https://www.desertcart.at/products/9442028-387s-low-drain-1-55v-silver-oxide-button-cell-battery) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-10-24*