--- product_id: 358353816 title: "3500mAh Rechargeable Replacement Lithium Battery Compatible with Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker" brand: "rapthor" price: "AR$57778" currency: ARS in_stock: true reviews_count: 9 category: "Rapthor" url: https://www.desertcart.com.ar/products/358353816-3500mah-rechargeable-replacement-lithium-battery-compatible-with-harman-kardon-onyx store_origin: AR region: Argentina --- # 3500mAh High Capacity Easy Installation Kit Included Built-in Safety Circuit 3500mAh Rechargeable Replacement Lithium Battery Compatible with Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker **Brand:** rapthor **Price:** AR$57778 **Availability:** ✅ In Stock ## Summary > 🔋 Power your vibe, never miss a beat! ## Quick Answers - **What is this?** 3500mAh Rechargeable Replacement Lithium Battery Compatible with Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker by rapthor - **How much does it cost?** AR$57778 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-lithium-battery-compatible-with-harman-kardon-onyx) ## 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 - • **Safe & Sound:** Integrated protection circuit guards against overcharge, over-discharge, and short circuits for worry-free use. - • **Power Up Longer:** 3500mAh capacity delivers extended playtime beyond the original battery, keeping your Onyx Studio rocking all day. - • **Universal Onyx Fit:** Seamlessly compatible with Harman Kardon Onyx Studio 1 through 4, restoring your speaker’s wireless freedom. - • **Plug & Play Simplicity:** Comes with screwdriver and plastic tool for a hassle-free, quick battery swap—no tech degree needed. - • **Durability Meets Design:** Foam cushioning and reinforced wiring ensure a secure, damage-resistant connection for lasting performance. ## Overview The Rapthor 3500mAh Rechargeable Replacement Lithium Battery is a high-capacity, safe, and easy-to-install power solution designed specifically for Harman Kardon Onyx Studio models 1 to 4. It includes all necessary tools for quick installation, features enhanced durability with foam cushioning and longer wiring, and incorporates built-in safety circuits to protect your device. Perfect for professionals who demand reliable, long-lasting wireless audio performance on the go. ## Description desertcart.com: Rapthor 3500mAh Rechargeable Replacement Lithium Battery Compatible with Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker : Toys & Games Review: Good replacement for the original battery! - 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. 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 Lithium Battery: 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 | | Amperage | 3500 milliamps | | Best Sellers Rank | #143,851 in Toys & Games ( See Top 100 in Toys & Games ) #713 in Hobby Remote & App Controlled Vehicle Batteries | | 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 | 4.4 out of 5 stars 334 Reviews | | Enclosure Material | Plastic | | Included Components | Install tool, Replacement battery, Screwdriver | | Input Voltage | 3.7 volts | | Item Weight | 0.11 kg | | Manufacturer | MSW (Shenzhen) Technology Limited | | Model Name | Replacement Battery | | Number of Items | 1 | | Number of Power Levels | 1 | | Output Voltage | 3.7 volts | | Power Plug | No Plug | | Power Source | Battery Powered | | Special Feature | Easy to Install, Higher Capacity, Short Circuit Protection | | Special Features | Easy to Install, Higher Capacity, Short Circuit Protection | | UPC | 735818080479 | | Unit Count | 1 Count | | Voltage | 3.7 volts | | Warranty Description | 1 year warranty provided. | | Wattage | 12.95 watts | ## Product Details - **Amperage:** 3500 milliamps - **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 - **Special Feature:** Easy to Install, Higher Capacity, Short Circuit Protection - **Wattage:** 12.95 watts ## Images ![3500mAh Rechargeable Replacement Lithium 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) ## 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 ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ 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. ## 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-lithium-battery-compatible-with-harman-kardon-onyx](https://www.desertcart.com.ar/products/358353816-3500mah-rechargeable-replacement-lithium-battery-compatible-with-harman-kardon-onyx) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-09-19*