---
product_id: 383069426
title: "[Upgraded 3500mAh] Replacement Battery for Harman Kardon Onyx Studio 1/2/ 3/4 Speaker"
brand: "nyi"
price: "B/.55"
currency: PAB
in_stock: true
reviews_count: 8
category: "Nyi"
url: https://www.desertcart.com.pa/products/383069426-upgraded-3500mah-replacement-battery-for-harman-kardon-onyx-studio-1
store_origin: PA
region: Panama
---

# 3.7V Stable Voltage 3500mAh High Capacity Built-in PTC Safety Protections [Upgraded 3500mAh] Replacement Battery for Harman Kardon Onyx Studio 1/2/ 3/4 Speaker

**Brand:** nyi
**Price:** B/.55
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your vibe, never miss a beat!

## Quick Answers

- **What is this?** [Upgraded 3500mAh] Replacement Battery for Harman Kardon Onyx Studio 1/2/ 3/4 Speaker by nyi
- **How much does it cost?** B/.55 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/383069426-upgraded-3500mah-replacement-battery-for-harman-kardon-onyx-studio-1)

## Best For

- nyi enthusiasts

## Why This Product

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

## Key Features

- • **DIY Friendly Kit:** Includes tools and adhesive tapes for a quick, hassle-free battery swap in under 10 minutes.
- • **Power Up Your Sound:** Upgrade your Onyx Studio with a robust 3500mAh battery for marathon listening sessions.
- • **Safety First, Always:** Integrated pressure, temperature, and current protections keep your battery and device safe.
- • **Seamless Compatibility:** Perfectly fits Harman Kardon Onyx Studio 1 through 4 models—no guesswork, just plug & play.
- • **Confidence in Every Charge:** Backed by 12 months warranty and 24/7 email support—because your sound deserves reliability.

## Overview

The NYI Upgraded 3500mAh Replacement Battery is a high-capacity, 3.7V lithium-ion battery designed specifically for Harman Kardon Onyx Studio models 1 through 4. Featuring built-in PTC safety protections and a DIY-friendly installation kit, it ensures extended playtime and reliable performance. Supported by a 12-month warranty and responsive customer service, this battery is the ultimate upgrade to keep your premium speaker sounding fresh and powerful.

## Description

desertcart.com: NYI [Upgraded 3500mAh] Replacement Battery for Harman Kardon Onyx Studio 1/2/ 3/4 Speaker : Electronics

Review: Great replacement - Easy replacement for the original battery. Got my speaker back up and working. Would recommend this to everybody.
Review: Easy to replace, great battery life. - Works great! My two Onyx 3 speakers were down to 30 minutes playtime. It took less than 10 minutes with each speaker to put in the new batteries. The screws on the Onyx 3 are standard Phillips. I’ve only tested one so far because after 5 hours it was still playing strong, I believe the second speaker will be just was strong. With the Onyx 3 the battery case screws are slightly shorter than the speaker case screws, just keep them separate.

## Features

- Compatible with : NYI Harman Kardon Replacement Battery compatible with Harman Kardon Onyx Studio, Harman Kardon Onyx Studio-1,Harman Kardon Studio-2, Harman Kardon Studio-3, Harman Kardon Studio-4, li11b001f Speaker.
- High Capacity : 3500mAh Large Capacity Li-ion replacement battery; Battery voltage: 3.7V / 12.95Wh.
- High Quality & Safety : NYI Harman Kardon Onyx Studio battery built-in PTC protections (pressure, temperature, current),make sure the battery run stably and perfectly.
- Package Includes : 1 pc harman kardon replacement battery, 2 pcs tools, 2 pcs adhesive tapes.
- After-sales Service : 12 months warranty.24 hours email support. Your satisfaction is important to us, please contact us with any question.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09C25691F |
| Batteries | 1 Lithium Ion batteries required. |
| Best Sellers Rank | #66,990 in Electronics ( See Top 100 in Electronics ) #1,618 in Portable Bluetooth Speakers |
| Customer Reviews | 4.6 4.6 out of 5 stars (200) |
| Date First Available | August 6, 2021 |
| Item Weight | 3.84 ounces |
| Manufacturer | MSW (Shenzhen) Technology Limited |
| Package Dimensions | 6.73 x 3.9 x 1.14 inches |

## Product Details

- **Battery Capacity:** 3500 Milliamp Hours
- **Battery Cell Composition:** Lithium Ion
- **Brand:** NYI
- **Number of Batteries:** 1 Lithium Ion batteries required.
- **Recommended Uses For Product:** Speaker

## Images

![[Upgraded 3500mAh] Replacement Battery for Harman Kardon Onyx Studio 1/2/ 3/4 Speaker - Image 1](https://m.media-amazon.com/images/I/7148tIm5C0L.jpg)
![[Upgraded 3500mAh] Replacement Battery for Harman Kardon Onyx Studio 1/2/ 3/4 Speaker - Image 2](https://m.media-amazon.com/images/I/7161W-GMc3L.jpg)
![[Upgraded 3500mAh] Replacement Battery for Harman Kardon Onyx Studio 1/2/ 3/4 Speaker - Image 3](https://m.media-amazon.com/images/I/71dqpDYn0XL.jpg)
![[Upgraded 3500mAh] Replacement Battery for Harman Kardon Onyx Studio 1/2/ 3/4 Speaker - Image 4](https://m.media-amazon.com/images/I/71geqR+dDxL.jpg)
![[Upgraded 3500mAh] Replacement Battery for Harman Kardon Onyx Studio 1/2/ 3/4 Speaker - Image 5](https://m.media-amazon.com/images/I/71mFCoqF5GL.jpg)

## Questions & Answers

**Q: It says that I can't have this delivered to my address,  is it possible to have it delivered to a store like Oreilly's.**
A: Hello, if the logistics cannot deliver the NYI Harman Kardon Onyx Studio Battery Replacement to your address, you can try to change the address to an address that FBA can deliver. The specific operations are as follows:
1. You can open the purchase page of "[Upgraded 3500mAh] NYI Replacement Battery for Harman Kardon Onyx Studio 1/2/ 3/4 Wireless Bluetooth Speaker" on the computer, and click "pickup" in the upper right corner to select the shipping address that suits you.
Please note: This operation has a certain risk of losing goods, please use it with caution.
2. You can choose the address that Amazon can deliver to (such as your friend's house).

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great replacement
*by P***H on October 13, 2025*

Easy replacement for the original battery. Got my speaker back up and working. Would recommend this to everybody.

### ⭐⭐⭐⭐⭐ Easy to replace, great battery life.
*by T***X on March 24, 2025*

Works great! My two Onyx 3 speakers were down to 30 minutes playtime. It took less than 10 minutes with each speaker to put in the new batteries. The screws on the Onyx 3 are standard Phillips. I’ve only tested one so far because after 5 hours it was still playing strong, I believe the second speaker will be just was strong. With the Onyx 3 the battery case screws are slightly shorter than the speaker case screws, just keep them separate.

### ⭐⭐⭐⭐⭐ Easy install
*by M***Y on March 29, 2024*

Very clear directions and simple process. Took me 10 minutes to replace the battery on my Onyx 4 and it works great. Comes with everything you need.

## Frequently Bought Together

- NYI [Upgraded 3500mAh] Replacement Battery for Harman Kardon Onyx Studio 1/2/ 3/4 Speaker
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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-02-10*