--- product_id: 358353816 title: "3500mAh Rechargeable Replacement Battery Compatible with Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker" brand: "rapthor" price: "AR$56972" currency: ARS in_stock: true reviews_count: 8 category: "Rapthor" url: https://www.desertcart.com.ar/products/358353816-3500mah-rechargeable-replacement-battery-compatible-with-harman-kardon-onyx-studio store_origin: AR region: Argentina --- # 3500mAh High Capacity Easy Quick Install Kit Built-in Safety Circuit 3500mAh Rechargeable Replacement Battery Compatible with Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker **Brand:** rapthor **Price:** AR$56972 **Availability:** ✅ In Stock ## Summary > 🔋 Recharge your vibe, keep the party alive! ## Quick Answers - **What is this?** 3500mAh Rechargeable Replacement Battery Compatible with Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker by rapthor - **How much does it cost?** AR$56972 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/358353816-3500mah-rechargeable-replacement-battery-compatible-with-harman-kardon-onyx-studio) ## Best For - rapthor enthusiasts ## Why This Product - Trusted rapthor brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety First, Always:** Advanced protection circuit guards against overcharge, discharge, and short-circuits. - • **Perfect Compatibility:** Tailored fit for Harman Kardon Onyx Studio 1 through 4 models. - • **Effortless DIY Upgrade:** Includes screwdriver and plastic tool for a seamless battery swap. - • **Power That Lasts Longer:** 3500mAh capacity outperforms the original for extended playtime. - • **Engineered for Durability:** Foam cushioning and reinforced wiring ensure lasting, stable connections. ## Overview The Rapthor 3500mAh Rechargeable Replacement Battery is a high-capacity, safe, and easy-to-install power solution designed specifically for Harman Kardon Onyx Studio 1-4 Bluetooth speakers. It features enhanced durability with foam cushioning and longer wiring, built-in protection circuits for safe performance, and comes with all necessary tools for a quick DIY upgrade—bringing your speaker back to life with longer-lasting energy and reliable connectivity. ## Description Product description Rapthor 3500mAh Replacement Battery for Harman Kardon Onyx Studio 1/2/3/4 Speakers Compatibility Harman Kardon Onyx Studio 1 Harman Kardon Onyx Studio 2 Harman Kardon Onyx Studio 3 Harman Kardon Onyx Studio 4 Specifications Battery Type: Li-ion Product Type: Replacement Battery Capacity: 3500mAh Voltage: 3.7V / 12.95Wh Higher Capacity 3500mAh high power replacement battery extend longer-lasting working time to your bluetooth speaker. Easy to Install Quick install within 10 minutes with included screwdriver and plastic tool. It’s quite simple. Safe Performance Built-in protection circuit well protects the rechargeable battery from over-charge, over-discharge, short-circuit. Considerate Details Foam strip for cushion absorbing, super long (longer than original’s) and durable battery wire for better connection, sponge tape well protects the connector wire from damage. Package Included 1 x Rapthor Replacement Battery 1 x Screwdriver 1 x Plastic Install Tool 1 x User Manual Review: Perfect for for my speaker - Perfect fit. My speaker is working again without the power cord. Watch YouTube videos for instructions on how to install. Review: Onyx 4 Replacement - Overall, I am pleased. Let me first say that the directions included did not support the Onyx 4. However, this was a pretty easy battery swap. Back screws are under the grommets that hold the screen. Didn’t need the driver that came with it. Just use a standard small Phillips driver. Battery came charged. My speaker was back to normal in a few minutes. Keep in mind that this is a smaller battery than that of the original as far as physical size. However, even if it doesn’t last as long, which it may, I’m very happy with this battery. I missed my portability. No issues here so far. ## Features - 3500mAh High Capacity: Higher capacity than original battery, longer-lasting performance. - Easy to Use: Simply quick install with included screwdriver and plastic tool. - Considerate Details: Foam strip for cushion absorbing, durable and longer than original’s battery wire for better connection, sponge tape well protects the connector wire from damage. - Safe Performance: Built-in protection circuit well protects the rechargeable battery from over-charge, over-discharge, short-circuit. - Compatibility: Compatible with Harman Kardon Onyx Studio, Onyx Studio 2, Onyx Studio 3, Onyx Studio 4. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B099NJVQQ7 | | Additional Features | Easy to Install, Higher Capacity, Short Circuit Protection | | Best Sellers Rank | #18,441 in Electronics ( See Top 100 in Electronics ) #531 in Portable Bluetooth Speakers | | Brand | rapthor | | Built-In Media | Install tool, Replacement battery, Screwdriver | | Color | Black | | Compatible Devices | Compatible with Harman Kardon Onyx Studio 1/2/3/4 | | Compatible Phone Models | Compatible with Harman Kardon Onyx Studio 1/2/3/4 | | Connectivity Technology | Bluetooth | | Connector Type | wireless | | Customer Package Type | Standard Packaging | | Customer Reviews | 4.5 out of 5 stars 329 Reviews | | Enclosure Material | Plastic | | Included Components | Install tool, Replacement battery, Screwdriver | | Input Voltage | 3.7 Volts | | Item Weight | 0.11 Kilograms | | Manufacturer | MSW (Shenzhen) Technology Limited | | Model Name | Replacement Battery | | Number of Items | 1 | | Number of Power Levels | 1 | | Output Voltage | 3.7 Volts | | Portable | Yes | | Power Plug | No Plug | | Power Source | Battery Powered | | Special Feature | Easy to Install, Higher Capacity, Short Circuit Protection | | UPC | 735818080479 | | Unit Count | 1.0 Count | | Voltage | 3.7 Volts | | Warranty Description | 1 year warranty provided. | | Wattage | 12.95 watts | ## Product Details - **Brand:** rapthor - **Color:** Black - **Compatible Devices:** Compatible with Harman Kardon Onyx Studio 1/2/3/4 - **Compatible Phone Models:** Compatible with Harman Kardon Onyx Studio 1/2/3/4 - **Connector Type:** wireless - **Included Components:** Install tool, Replacement battery, Screwdriver - **Input Voltage:** 3.7 Volts - **Number of Items:** 1 - **Special Feature:** Easy to Install, Higher Capacity, Short Circuit Protection - **Wattage:** 12.95 watts ## Images ![3500mAh Rechargeable Replacement Battery Compatible with Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker - Image 1](https://m.media-amazon.com/images/I/716QlRKgC-L.jpg) ![3500mAh Rechargeable Replacement Battery Compatible with Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker - Image 2](https://m.media-amazon.com/images/I/71w4aAwGlHL.jpg) ![3500mAh Rechargeable Replacement Battery Compatible with Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker - Image 3](https://m.media-amazon.com/images/I/71tBrEvyFDL.jpg) ![3500mAh Rechargeable Replacement Battery Compatible with Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker - Image 4](https://m.media-amazon.com/images/I/71oNlwyPlPL.jpg) ![3500mAh Rechargeable Replacement Battery Compatible with Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker - Image 5](https://m.media-amazon.com/images/I/71gzhpaBbzL.jpg) ## Questions & Answers **Q: Any feedback after using it for a while?** A: Sorry charged after it arrived and haven’t used it. So I don’t know how long it holds a charge ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect for for my speaker *by H***O on August 13, 2025* Perfect fit. My speaker is working again without the power cord. Watch YouTube videos for instructions on how to install. ### ⭐⭐⭐⭐⭐ Onyx 4 Replacement *by M***B on February 13, 2024* Overall, I am pleased. Let me first say that the directions included did not support the Onyx 4. However, this was a pretty easy battery swap. Back screws are under the grommets that hold the screen. Didn’t need the driver that came with it. Just use a standard small Phillips driver. Battery came charged. My speaker was back to normal in a few minutes. Keep in mind that this is a smaller battery than that of the original as far as physical size. However, even if it doesn’t last as long, which it may, I’m very happy with this battery. I missed my portability. No issues here so far. ### ⭐⭐⭐⭐⭐ Good replacement for the original battery! *by Q***E on March 9, 2024* My Harman/Kardon Onyx speaker is one of my favorites for rocking the bass while playing games or music. Yes, it is old now, but still worked great, except for one thing: the original battery no longer charged, so I was stuck with having to place the speaker near an AC source. Well, I finally got tired of that, so I looked for a replacement battery. This one got good reviews, had the necessary tools with it, was readily available, and was priced right. I'm listening to my wireless BT speaker right now, while I write this review. Very happy. If anything goes wrong, I'll let you know. ## Frequently Bought Together - Rapthor 3500mAh Rechargeable Replacement Battery Compatible with Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker - for Harman Kardon Charger Onyx Studio 8 7 6 5 4 3 2 1 Wireless Bluetooth Speaker Replacement Harmon Kardon Charger 19V AC Power Cord Supply【10 FT】 VHBW - Charger for Harman Kardon Onyx Studio 8 7 6 5 4 3 2 1 Wireless Bluetooth Portable Speaker Compatible with Harman Kardon Charger 19V 38W AC Charger Fast Replacement Power Adapter --- ## 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.com.ar/products/358353816-3500mah-rechargeable-replacement-battery-compatible-with-harman-kardon-onyx-studio](https://www.desertcart.com.ar/products/358353816-3500mah-rechargeable-replacement-battery-compatible-with-harman-kardon-onyx-studio) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-05-20*