Features & Benefits
- Premium Lithium-Polymer Battery
- Capacity:3500mAh, 5.9Wh
- No memory effect
- CE certified and tested by manufacturer
- Multiple circuit protection
- Home Page /
- Health & Household /
- Household Supplies /
- Household Batteries /
- 3.7V /
- Tectra 3500mAh Battery for Harman Kardon Onyx...
0 ratings
Item #:
59356997
Tectra 3500mAh Battery for Harman Kardon Onyx Studio 4, Onyx Studio 3, Onyx Studio 2, Onyx Studio 1 Wireless Bluetooth Speaker
Item #:
59356997
BTN 2587
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
0 ratings
Write a review
In stock
Imported from USA store
QTY:
Order now and get it around Saturday, August 29
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Our Top Logistics Partners
Brand new replacement battery compatible with Harman/Kardon Onyx Studio, Onyx Studio 2, Onyx Studio 3, Onyx Studio 4
Fast
Shipping
Free
Return*
Secure Packaging
100% Original Products
PCI DSS Compliance
ISO 27001 Certified
Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
High Capacity
The 3500mAh capacity ensures extended playtime, allowing users to enjoy their Harman Kardon speakers for longer periods without interruption, significantly enhancing audio experiences.
Compatible Design
Custom-fit for various Onyx Studio models, this battery replacement guarantees seamless integration without compromising performance, addressing user needs for easy and efficient installation.
Durable Quality
Crafted with high-quality materials, the Tectra battery offers reliability and longevity, providing consumers with great value and peace of mind, knowing their devices are powered safely.
Product Details
- Brand new replacement battery for Harman Kardon Onyx Studio series and li11b001f Wireless Bluetooth Speaker.
- Premium Lithium-Polymer Battery with 3.7V voltage and 3500mAh capacity, with no memory effect.
- CE certified and tested to match OEM products, built with multiple circuit protection and high-quality, fire-resistant construction.
- Package includes 1 x Replacement Battery and Install Tools.
- Compatible with Harman Kardon Onyx Studio, Onyx Studio 2, Onyx Studio 3, Onyx Studio 4, li11b001f.
- 30 Days Money Back, Two-Years Warranty. Please check device and original battery part number for compatibility before purchase.
| Number of Batteries | 1 Lithium Ion batteries required. (included) |
| Brand | Tectra |
| Model Number | HK-OS4 |
| Model Name | HK-OS4 |
| Manufacturer | Tectra |
| Included Components | battery |
| Battery Capacity | 3500 milliamp_hours |
| Voltage | 3.7 volts, 7.4 volts |
| Reusability | Rechargeable |
| Compatible Phone Models | Harman Kardon Onyx Studio, Onyx Studio 2, Onyx Studio 3, Onyx Studio 4, li11b001f Wireless Bluetooth Speaker |
| Unit Count | 1 Count |
| Battery Weight | 50 g |
| Antenna Location | Speaker |
| Battery Cell Type | Lithium Ion |
| Battery Cell Composition | Lithium Ion |
| Recommended Uses For Product | Speaker |
Dangerous Goods
To avoid the delay in customs clearance process for Dangerous Goods, the shipment shall be opened at our warehouse facility to check the severity of hazardous components. Please see the list of Dangerous goods here.
Who Should Buy?
-
Frequent Travelers
Users who travel often will benefit from extended battery life, ensuring music playback on the go without interruptions.
-
Audio Enthusiasts
Those who appreciate high-quality sound and wish to maintain their speaker's performance will find this reliable replacement valuable.
-
DIY Repairers
Individuals who enjoy repairing their devices will appreciate the easy installation process of this battery replacement.
-
Casual Users
Users who rarely use their speakers may not find a battery replacement necessary, as original battery life suffices.
Product Description
Tectra 3500mAh Battery for Harman Kardon Onyx Studio 4, Onyx Studio 3, Onyx Studio 2, Onyx Studio 1 Wireless Bluetooth Speaker
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What devices are compatible with the Tectra 3500mAh Battery Replacement?
Answer: The Tectra 3500mAh Battery Replacement is specifically designed for Harman Kardon Onyx Studio models 1, 2, 3, and 4. These speakers are known for their high-quality audio output and portability, making them perfect for on-the-go use. If you own any of these models, this battery replacement allows you to restore or enhance the performance of your speaker, ensuring uninterrupted listening during social gatherings or personal enjoyment. -
Question:
How do I install the Tectra 3500mAh Battery Replacement?
Answer: Installing the Tectra 3500mAh Battery Replacement involves opening the back cover of your Harman Kardon Onyx Studio speaker, carefully removing the old battery, and inserting the new one. It's crucial to follow the manufacturer's instructions or watch tutorial videos if you're unsure. Proper installation ensures that your battery operates efficiently, leading to longer playtimes for music, podcasts, or audiobooks without interruptions. -
Question:
How long does the Tectra 3500mAh Battery last on a single charge?
Answer: The Tectra 3500mAh Battery typically lasts for several hours of playback on a full charge. Factors affecting its longevity include the volume level and usage patterns. Optimizing settings, such as keeping the volume at moderate levels, can extend the battery life, making this replacement ideal for events, outdoor activities, or personal leisure without frequent recharging interruptions. -
Question:
Is it safe to use third-party batteries like Tectra?
Answer: Yes, using third-party batteries like the Tectra 3500mAh Battery Replacement is generally safe, provided they meet necessary safety and performance standards. Tectra batteries are designed to match or exceed the specifications of the original battery. This compatibility ensures you maintain similar performance levels, enhancing your user experience while avoiding potential risks associated with lower-quality alternatives. -
Question:
What should I do if my speaker does not turn on after replacing the battery?
Answer: If your Harman Kardon Onyx Studio speaker doesn't turn on after replacing the Tectra battery, first check if the battery is properly connected with correct polarity. Then ensure the battery is charged. If the issue persists, try resetting the speaker following the manufacturer’s guidelines. A successful reset can sometimes restore functionality without needing further troubleshooting. -
Question:
Can I charge the Tectra 3500mAh Battery with my existing charger?
Answer: Absolutely, the Tectra 3500mAh Battery is designed to be charged using the original charger of your Harman Kardon Onyx Studio speaker. Using your existing charger ensures compatibility and optimal charging performance. This convenience means less hassle since you can seamlessly continue using the devices you already own, making it a great choice for users looking for an efficient power solution. -
Question:
How does the Tectra battery compare to the original battery?
Answer: The Tectra 3500mAh Battery Replacement is designed to meet or exceed the performance of the original Harman Kardon battery. It offers similar output power and longevity, ensuring your speaker maintains its robust audio quality. By choosing Tectra, users can often enjoy improved reliability and performance, making it an excellent option for both new listeners and veteran audio enthusiasts. -
Question:
Can I use my speaker while it's charging with the Tectra battery?
Answer: Yes, you can use your Harman Kardon Onyx Studio speaker while it's charging with the Tectra 3500mAh Battery installed. This flexibility allows you to enjoy music or podcasts without interruption, whether at home, at work, or on the go. It's particularly beneficial during extended sessions of use, like parties or work presentations, where continuous audio is desired. -
Question:
Why choose a 3500mAh battery over other capacities?
Answer: The 3500mAh capacity of the Tectra battery strikes a balance between performance and longevity. It offers an extended playtime compared to lower-capacity alternatives, which is crucial for users who want uninterrupted enjoyment. Choosing this capacity ensures that your Harman Kardon Onyx Studio speaker keeps the music playing longer, whether during a long road trip or a weekend gathering. -
Question:
Where can I buy Tectra 3500mAh Battery Replacement for Harman Kardon Onyx Studio models?
Answer: You can purchase the Tectra 3500mAh Battery Replacement for Harman Kardon Onyx Studio models from Ubuy in Bhutan. Ubuy provides a convenient online shopping platform ensuring secure transactions and efficient service. They often stock a variety of replacement batteries and accessories tailored for your speaker's needs, making it easy for you to find the right product to enhance your audio experience.
Nutritionist's Take
As a nutritionist with extensive experience, I must clarify that the Tectra 3500mAh Battery Replacement is not a nutritional product and does not have any food-related components, ingredients, or health claims. It is an electronic accessory designed to replace the battery of specific Harman Kardon wireless Bluetooth speakers. Therefore, it does not offer any nutritional benefits or drawbacks and is not relevant to dietary needs or health. Consumers should focus on aspects such as battery longevity and performance when considering this product, rather than any implications on health or nutrition. Overall, this product is a practical choice for users seeking to enhance their audio experience with extended battery life.
Tectra 3.7V HK-OS4 Editorial Review
The Tectra 3500mAh Rechargeable Battery Replacement for Harman Kardon Onyx Studio 1234 Wireless Bluetooth Speaker has received mixed reviews from customers. Many users have praised the battery’s long-lasting power, noting that it provides much longer playback time than the original battery. Several customers have also mentioned that the battery is easy to install and fits well into the Harman Kardon Onyx Studio 1234. However, some users have reported issues with the battery’s charging ability. Several reviewers have noted that the battery does not charge fully or that it loses power quickly, even with limited use. Some customers have also reported that the battery does not fit snugly into the speaker, which can lead to it falling out during use. Overall, the Tectra 3500mAh Rechargeable Battery Replacement for Harman Kardon Onyx Studio 1234 Wireless Bluetooth Speaker seems to be a viable option for users looking to extend the battery life of their speaker. However, some customers may encounter charging and fitting issues.
Customer Reviews & Ratings
1 customers ratings
-
5 Star
100%
-
4 Star
0%
-
3 Star
0%
-
2 Star
0%
-
1 Star
0%
Review this product
Share your thoughts with other customers
Pros
- Longer playback time than original battery
- Easy to install
- Provides extended battery life
Cons
- Battery may not fit snugly into the speaker, leading to possible falling out during use
Platform Trust & Buyer Confidence
MA
Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
CK
Chitra
Verified buyer
“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
K
kund
Verified buyer
“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
OO
Onesi
Verified buyer
“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
SJ
SAO JOHN
Verified buyer
“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”
23 July 2026 · via Trustpilot
Secure Checkout
Global Delivery
Easy Returns
Genuine Products
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
BTN 2587
Order now and get it around Saturday, August 29
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Secured transaction
PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
Our Top Logistics Partners
Fastest cross-border delivery
Ubuy Assurance
Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.