---
product_id: 527954538
title: "3500mAh Battery for Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker HK-OS4"
brand: "uwayor"
price: "$1407"
currency: MXN
in_stock: true
reviews_count: 13
category: "Uwayor"
url: https://www.desertcart.mx/products/527954538-3500mah-battery-for-harman-kardon-onyx-studio-1-2-3
store_origin: MX
region: Mexico
---

# 3.7V fast, efficient voltage 3500mAh high-capacity power Built-in microchip protection 3500mAh Battery for Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker HK-OS4

**Brand:** uwayor
**Price:** $1407
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your vibe—never miss a beat with unstoppable energy!

## Quick Answers

- **What is this?** 3500mAh Battery for Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker HK-OS4 by uwayor
- **How much does it cost?** $1407 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/527954538-3500mah-battery-for-harman-kardon-onyx-studio-1-2-3)

## Best For

- uwayor enthusiasts

## Why This Product

- Trusted uwayor brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Safety Tech:** Integrated microchips guard against overcharging, overheating, and short circuits.
- • **Eco-Friendly Recharge:** No memory effect means longer battery life and sustainable savings.
- • **Power Through Your Day:** 3500mAh capacity delivers extended playtime beyond the original battery.
- • **Seamless Compatibility:** Perfectly fits Harman Kardon Onyx Studio 1/2/3/4 models for hassle-free replacement.
- • **Plug & Play Convenience:** Direct fit design ensures quick installation without any technical fuss.

## Overview

This 3500mAh rechargeable replacement battery is engineered for Harman Kardon Onyx Studio 1/2/3/4 wireless speakers, offering longer playtime, smart safety features, and eco-conscious performance in a direct-fit design.

## Description

Shop Uwayor 3500mAh Battery for Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker HK-OS4. Free delivery and returns on eligible orders.

Review: Very good - Works well
Review: Works - Works very well

## Features

- 【Compatible】Replacement battery compatible for Harman, Kardon Onyx Studio 1/2/ 3/ 4 Wireless Bluetooth Speaker. Each battery cell is tested. so check your old battery model first to make sure this is the correct replacement battery.
- 【Battery Model】Voltage: 3.7V, Capacity: 3500mAh;Rechargeable and no memory effect. Environmental protection Rechargeable and no memory effect, use rechargeable battery can save money.
- 【User Tips】Fits directly into the battery slot, The battery capacity of our product is 3500mAh. High capacity can last longer than the original battery, which brings you sufficient playing time for entertainment.
- 【High Quality】Made of premium class A battery cells, long-lasting and durable. High-speed, high-efficiency charging and built-in special microchips to protect your speakers from overcharging, overheating and short circuit.which will help extend battery life.
- 【Satisfactory Service】Our replacement battery is a good choice. We offer a 30-day after services. If you have any questions or problems, please do not hesitate to contact us.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BML7WGBW |
| Guaranteed software updates until | unknown |
| Manufacturer | Uwayor |
| Package Dimensions | 13.7 x 10.2 x 2.9 cm; 90 g |

## Product Details

- **Battery capacity:** 3500 Milliampere Hour (mAh)
- **Battery cell composition:** Lithium Ion
- **Brand:** Uwayor
- **Number of batteries:** 1 Lithium Polymer batteries required. (included)
- **Recommended uses for product:** MP3 Player

## Images

![3500mAh Battery for Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker HK-OS4 - Image 1](https://m.media-amazon.com/images/I/61oXzF4pCML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very good
*by L***T on 29 January 2026*

Works well

### ⭐⭐⭐⭐⭐ Works
*by A***E on 19 December 2025*

Works very well

### ⭐⭐⭐⭐ 2500mAh Usable Capacity
*by J***N on 14 September 2024*

I received this for free for review as part of Amazon Vine. This is a Harman Kardon Onyx Studio replacement battery. It comes with a decent torx screwdriver, and a cute little metal spudger. The battery is listed as 3500mAh and weights about 50g. I put the battery through extensive charge and discharge cycles to test its capacity, and found it had a useable capacity of 2500mAh. I'm not sure how the battery rating is calculated, but given a LiPo can't be discharged to zero volts, and wouldn't work in the Onyx below a minimum voltage, I can't recommend the battery's rating sticker. At 2500mAh this is close to the original battery’s capacity, so it is a worthwhile replacement. However, I'm dropping one-star as none of this is made clear in its listing.

## Frequently Bought Together

- Uwayor 3500mAh Battery for Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker HK-OS4
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**Shop now:** [https://www.desertcart.mx/products/527954538-3500mah-battery-for-harman-kardon-onyx-studio-1-2-3](https://www.desertcart.mx/products/527954538-3500mah-battery-for-harman-kardon-onyx-studio-1-2-3)

---

*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-03-01*