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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.







| ASIN | B099NJVQQ7 |
| Additional Features | Easy to Install, Higher Capacity, Short Circuit Protection |
| Best Sellers Rank | #52,210 in Electronics ( See Top 100 in Electronics ) #1,382 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 4.5 out of 5 stars (330) |
| Enclosure Material | Plastic |
| 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 |
| UPC | 735818080479 |
| Unit Count | 1.0 Count |
| Voltage | 3.7 Volts |
| Warranty Description | 1 year warranty provided. |
| Wattage | 12.95 watts |
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