The core competitiveness of TWS headphones in entering the international market cannot be separated from the built-in lithium batteries (single cells and charging cases). These batteries are small in size, mostly in a pouch form, have precise BMS, and there are hardware differences between the left and right units. According to the IECEE system requirements, the batteries of TWS headphones need to be individually certified by CB before they can leverage the global mutual recognition advantage to quickly convert local certifications in various countries and successfully enter the markets of 54 member countries such as the EU, South Korea, and Australia.
I. Awareness and Popularization: What is CB Certification? Why is it necessary for TWS headphone batteries?
(1) Core Definition and Standard Basis
CB certification for TWS headphone batteries is a global safety certification under the IECEE system, following the principle of "one test, one certificate, global mutual recognition". The core basis are two standards: IEC 62133-2 (battery safety, controlling overcharge, short circuit, etc.) and IEC 62368-1:2023 (information technology equipment safety, to be fully implemented in 2026). Batteries with wireless charging function need to supplement IEC 62479 radio frequency radiation testing, and the left and right unit models need to be clearly distinguished. The model names of the left and right units should be clearly marked and the parameters should be consistent. They should also meet the requirements of the latest 2026 standard tests and be well adapted to the TWS whole machine. Note: CB certification for batteries and CB certification for the whole machine are independent and cannot be confused or substituted.
(2) Scope of Application and Core Judgement Criteria
All TWS headphones with built-in lithium batteries (single pouch cells, charging case batteries, including cylindrical models) are applicable. It covers all types of wired/wireless charging TWS headphones with batteries. Core judgment: Safety performance meets the standards, no fire, explosion, or leakage risks; electromagnetic compatibility meets the limits; the model names of the left and right units are clear and the parameters are consistent; they meet the new test requirements of the latest 2026 standard and are well adapted to the TWS whole machine. Note: CB certification for batteries and CB certification for the whole machine are independent and cannot be confused or substituted.
(3) Core Necessity of CB Certification Processing
1. Global mutual recognition reduces costs, with the certificate allowing direct conversion to various national certifications (CE, KC, SAA, etc.), saving 30%-60% of time costs; 2. Break through multiple country entry barriers, without certification, it is impossible to pass the customs clearance of the target country; 3. Meet the requirements for global e-commerce entry by Amazon, Coupang, etc.; 4. Avoid trade risks, reduce repetitive testing, and at the same time enhance the trust of overseas buyers.
II. Practical Guidance: The Complete Process of CB Certification for TWS Headphone Batteries
(1) Required Application Materials
English versions (with official seal): 1. 2-3 sets of production-identical samples (including left and right unit batteries, charging case batteries, with complete model markings); 2. Business license, ISO 9001 system documents (if not from the own factory, attach authorization); 3. English specification sheets, BMS function descriptions, compliance certificates for core components; 4. Application forms, consistency statements, test commission agreements; 5. Product photos, English instructions, comparison table of left and right unit models.
(2) Complete Processing Flow (5 steps for efficient certification)
1. Select an NCB institution and CBTL laboratory recognized by IECEE; 2. Submit materials and samples, and after review, start the case; 3. Complete all-item tests according to the latest standards (safety, EMC, etc.), and issue rectification suggestions if不合格)； 4. After the NCB review report is correct， the certificate will be issued within 1-2 weeks； 5. With the CB certificate， supplement a few local documents to complete the certification conversion in various countries.
(3) Key Precautions
1. Adapt to the latest 2026 standard and complete the new test items； 2. Strictly distinguish the left and right unit models， and cannot apply for certification for only one side； 3. The samples and production products should have completely consistent parameters and components； changes require re-testing； 4. All materials are in English， and there should be no errors or omissions in the parameters； 5. Choose a recognized institution， and reports from non-recognized institutions cannot be transferred for certification.
III. Service Transformation： Choose ZRLK， Efficient CB Certification for TWS Headphone Batteries for Smooth Clearance
The TWS earphone batteries are small in size, have strict model distinctions, update their standards rapidly, and have a high certification difficulty. ZRLK collaborates with the IECEE accreditation agency and laboratories to provide a full-chain service: 1. Authoritative qualifications, global mutual recognition of certificates, and adaptation transfer requirements; 2. Free pre-check, identifying common problems such as model distinctions and standard compatibility; 3. One-on-one guidance, assisting in preparing English materials and sample testing; 4. Support for expedited processing, simultaneously handling the transfer service; 5. Real-time synchronization of 2026 standard updates to ensure long-term compliance.
In 2026, the CB certification standards for TWS earphone batteries will be upgraded and the supervision will become stricter. Certification is the core document for global export. ZRLK can efficiently solve all the pain points in the certification process and help enterprises quickly seize the global market by relying on CB certification. If you have any needs for certification processing, sample testing, new regulation interpretation, expedited issuance of certificates, etc., please contact us to ensure the safety of your product's export!
