--- product_id: 9442028 title: "387S Low-Drain 1.55V Silver-Oxide Button Cell Battery" brand: "energizer" price: "486964₫" currency: VND in_stock: true reviews_count: 13 category: "Energizer" url: https://www.desertcart.vn/products/9442028-387s-low-drain-1-55v-silver-oxide-button-cell-battery store_origin: VN region: Vietnam --- # 600+ Hours Endurance 1.55V Silver-Oxide Power Ultra-Light 0.02 lbs 387S Low-Drain 1.55V Silver-Oxide Button Cell Battery **Brand:** energizer **Price:** 486964₫ **Availability:** ✅ In Stock ## Summary > 🔋 Power your precision life with Energizer’s enduring silver-oxide spark! ## Quick Answers - **What is this?** 387S Low-Drain 1.55V Silver-Oxide Button Cell Battery by energizer - **How much does it cost?** 486964₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/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 - • **Trusted Replacement:** Seamlessly replaces Rayovac RW51 with guaranteed compatibility - • **Peace of Mind Warranty:** Backed by Energizer’s lifetime limited warranty for ultimate confidence - • **Long-Lasting Performance:** Rated for 600+ hours in low-drain gadgets like watches & calculators - • **Reliable High-Energy Density:** Delivers consistent 1.55V power for your precision devices - • **Perfect Fit for Demanding Gear:** Compact 11.6mm diameter, ideal for cameras, pagers, and more ## Overview The Energizer 387S is a premium 1.55V silver-oxide button cell battery designed for continuous low-drain devices such as watches, cameras, and calculators. With a compact 11.6mm diameter and 3.6mm thickness, it delivers reliable 60mAh capacity and over 600 hours of use. Lightweight at just 0.02 pounds, it replaces Rayovac RW51 models and comes with a lifetime limited warranty, ensuring dependable power for your essential gear. ## 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. Review: The Right Battery for a Tricky Application - Battery worked perfectly with an Accutron Space View 214 Review: They work on my Grandfathers Pentax Spotmatic - What's to dislike!!! They work and at a GOOD price !!! ## 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 Amps | | Antenna Location | Watch | | Battery Capacity | 60 Milliamp Hours | | Battery Cell Type | Silver Oxide | | Best Sellers Rank | #121,506 in Health & Household ( See Top 100 in Health & Household ) #628 in Coin & Button Cell Batteries | | Brand | Energizer | | Built-In Media | Battery | | Customer Reviews | 4.5 4.5 out of 5 stars (420) | | Global Trade Identification Number | 00039800064554 | | Item Dimensions | 2 x 1 x 0.1 inches | | Item Weight | 0.02 Pounds | | 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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ The Right Battery for a Tricky Application *by B***G on December 14, 2025* Battery worked perfectly with an Accutron Space View 214 ### ⭐⭐⭐⭐⭐ They work on my Grandfathers Pentax Spotmatic *by B***E on September 18, 2024* What's to dislike!!! They work and at a GOOD price !!! ### ⭐⭐⭐⭐⭐ Battery NOT dead *by K***S on August 9, 2024* People who keep saying it arrives dead need to look closer at their battery tester. The BOTTOM bar is for button cell battery... Shows this battery is GOOD. The TOP signal bar is for OTHER batteries (shows dead). Good customer service as well... Gave fast refund when I received the wrong battery. Then shipped the right one fast. ## 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.vn/products/9442028-387s-low-drain-1-55v-silver-oxide-button-cell-battery](https://www.desertcart.vn/products/9442028-387s-low-drain-1-55v-silver-oxide-button-cell-battery) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-04-23*