2ARDY-B650Power Bank

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Rev 11/20/07 (SHENZHEN DAK TECHNOLOGY CO.,LTD) Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: 2ARDY-B650 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: Exhibit Type File Name Block Diagram, Schematics, Operational Description Block Diagram Schematics Operational Description The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, (Honglei Jia)

SHENZHEN DAK TECHNOLOGY CO.,LTD Model Difference 2021-04-12 EUT NAME: Power Bank FCC ID: 2ARDY-B650 MODEL : B650 BS001, B688, B651,B652,B653,B654,B655,B656,B657,B658,B659,B660 All the model are the same circuit and RF module, except model names. . Regards Sincerely Client’s signature Client’s name / title : Honglei Jia / CEO Contact information / address: 3-4/F,BLDG D,Demei Industrial CTR, Donghuan 2nd RD,Longhua St.,Longhua District,Shenzhen,China

(SHENZHEN DAK TECHNOLOGY CO.,LTD ) Federal Communications Commission Authorization and Evaluation Division 1435 Oakland Mills Road Columbia, MD 21046 Date: SUBJECT: FCC Application for FCC ID: 2ARDY-B650 To Whom It May Concern: We, the undersigned, hereby authorize Alan Mei at Shenzhen BCTC Testing Co., Ltd. on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by Alan Mei of Shenzhen BCTC Testing Co., Ltd. on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti- Drug Abuse Act. We, the applicant, are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section. Regards, (Honglei Jia)

External Photos

Label & label location Size:40*20mm Power Bank FCC ID: 2ARDY-B650 Label location

Internal Photos TransmittA ntenna

No.：BCTC/RF-EMC-005 Page 1 of 15 Edition：A.3 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2103491100-2E Applicant: SHENZHEN DAK TECHNOLOGY CO.,LTD Product Name: Power Bank Model/Type Ref.: B650 Tested Date: 2021-03-30 to 2021-04-07 Issued Date: 2021-04-07 Report No.: BCTC2103491100-2E No.：BCTC/RF-EMC-005 Page 2 of 15 Edition：A.3 FCC ID: 2ARDY-B650 The test report is effective only with both signature and specialized stamp.This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen BCTC Testing Co., Ltd, this report can’t be reproduced except in full.The tested sample(s) and the sample information are provided by the client. Product Name: Power Bank Trademark: Choetech Model/Type Ref.: B650 BS001, B688, B651,B652,B653,B654,B655,B656,B657,B658, B659,B660 Prepared For: SHENZHEN DAK TECHNOLOGY CO.,LTD Address: 3-4/F,BLDG D,Demei Industrial CTR, Donghuan 2nd RD,Longhua St.,Longhua District,Shenzhen,China Manufacturer: SHENZHEN DAK TECHNOLOGY CO.,LTD Address: 3-4/F,BLDG D,Demei Industrial CTR, Donghuan 2nd RD,Longhua St.,Longhua District,Shenzhen,China Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Tangwei, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2021-03-30 Sample tested Date: 2021-03-30 to 2021-04-07 Issue Date: 2021-04-07 Report No.: BCTC2103491100-2E Test Standards FCC CFR 47 part1, 1.1307(b), 1.1310 Test Results PASS Tested by: Approved by: Sam zeng/Project Handler Zero Zhou/Reviewer Report No.: BCTC2103491100-2E No.：BCTC/RF-EMC-005 Page 3 of 15 Edition：A.3 TABLE OF CONTENT Test Report Declaration Page 1. VERSION ............................................................ 4 2. PRODUCT INFORMATION ............................................. 5 2.1 Product Information ..................................................... 5 2.2 Support Equipment ..................................................... 5 2.3 Test Mode ............................................................. 5 3. TEST FACILITY AND TEST INSTRUMENT USED ......................... 7 3.1 Test Facility ............................................................ 7 3.2 Test Instrument Used ................................................... 7 4. METHOD OF MEASUREMENT ......................................... 8 4.1 Applicable Standard..................................................... 8 4.2 Block Diagram Of Test Setup ............................................. 8 4.3 Limit .................................................................. 9 4.4 Test procedure ......................................................... 9 4.5 Equipment Approval Considerations...................................... 10 4.6 E and H field Strength .................................................. 11 5. PHOTOGRAPHS OF TEST SET-UP .................................... 12 (Note: N/A means not applicable) Report No.: BCTC2103491100-2E No.：BCTC/RF-EMC-005 Page 4 of 15 Edition：A.3 1. VERSION Report No. Issue Date Description Approved BCTC2103491100-2E 2021-04-07 Original Valid Report No.: BCTC2103491100-2E No.：BCTC/RF-EMC-005 Page 5 of 15 Edition：A.3 2. PRODUCT INFORMATION 2.1 Product Information Model/Type Ref.: B650 BS001, B688, B651,B652,B653,B654,B655,B656,B657,B658,B659, B660 Model differences: All the model are the same circuit and RF module, except model names. Product Description: Power Bank Operation Frequency: 115kHz-205kHz Antenna installation: Inductive loop coil antenna Ratings: Micro USB Input: DC 5V2.4A, 9V2A (Max) USB-C Input: DC 5V2.4A, 9V2A (Max) USB-C Output: DC 5V2.4A, 9V2.2A, 12V1.6A (Max) USB-A Output: DC 5V3A, 9V2A, 12V1.5A (Max) Wireless Output: 10W (Max) Hardware Version: N/A Software Version: N/A 2.2 Support Equipment Device Type Brand Model Series No. Data Cable Remark Power Bank Choetech B650 BS001, B688, B651,B652,B6 53,B654,B655 ,B656,B657,B 658,B659, B660 N/A Auxiliary Notes: 1. All the equipment/cables were placed in the worst-case configuration to maximize the emission during the test. 2. Grounding was established in accordance with the manufacturer’s requirements and conditions for the intended use. 2.3 Test Mode Report No.: BCTC2103491100-2E No.：BCTC/RF-EMC-005 Page 6 of 15 Edition：A.3 Test Modes 1 Wireless Charging（10W）+USB-C:12V-1.6A Test Modes 2 Wireless Charging（10W）+USB-A:12V-1.5A Report No.: BCTC2103491100-2E No.：BCTC/RF-EMC-005 Page 7 of 15 Edition：A.3 3. TEST FACILITY AND TEST INSTRUMENT USED 3.1 Test Facility All measurement facilities used to collect the measurement data are located at Shenzhen BCTC Testing Co., Ltd. Address:1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Tangwei, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China. The site and apparatus are constructed in conformance with the requirements of ANSI C63.4 and CISPR 16-1-1 other equivalent standards. FCC Test Firm Registration Number: 712850 IC Registered No.: 23583 3.2 Test Instrument Used Equipment Manufacturer Model No. Serial No. Last Cal. Next Cal. Exposure Level Tester Narda ELT-400 N-0231 Jul. 15, 2020 Jul. 14, 2021 Magnetic field probe 100cm2 Narda B-Field Probe 100cm2 M0675 Jul. 15, 2020 Jul. 14, 2021 843 Chamber ETS 843 84301 Aug. 27, 2020 Aug. 26, 2023 Report No.: BCTC2103491100-2E No.：BCTC/RF-EMC-005 Page 8 of 15 Edition：A.3 4. METHOD OF MEASUREMENT 4.1 Applicable Standard According to §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to §1.1310 and §2.1093 RF exposure is calculated. According KDB680106 D01v03: RF Exposure Wireless Charging Apps v02. 4.2 Block Diagram Of Test Setup Note: Measurements should be made from all sides and the top of the primary/client pair, with the 15 cm measured from the center of the probe(s) to the edge of the devi…

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No.：BCTC/RF-EMC-005 Page 1 of 22 Edition：A.3 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2103491100-1E Applicant: SHENZHEN DAK TECHNOLOGY CO.,LTD Product Name: Power Bank Model/Type Ref.: B650 Tested Date: 2021-03-30 to 2021-04-07 Issued Date: 2021-04-07 Report No.: BCTC2103491100-1E No.：BCTC/RF-EMC-005 Page 2 of 22 Edition：A.3 FCC ID: 2ARDY-B650 The test report is effective only with both signature and specialized stamp.This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen BCTC Testing Co., Ltd, this report can’t be reproduced except in full.The tested sample(s) and the sample information are provided by the client. Product Name: Power Bank Trademark: Choetech Model/Type Ref.: B650 BS001, B688, B651,B652,B653,B654,B655,B656,B657,B658, B659,B660 Prepared For: SHENZHEN DAK TECHNOLOGY CO.,LTD Address: 3-4/F,BLDG D,Demei Industrial CTR, Donghuan 2nd RD,Longhua St.,Longhua District,Shenzhen,China Manufacturer: SHENZHEN DAK TECHNOLOGY CO.,LTD Address: 3-4/F,BLDG D,Demei Industrial CTR, Donghuan 2nd RD,Longhua St.,Longhua District,Shenzhen,China Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Tangwei, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2021-03-30 Sample tested Date: 2021-03-30 to 2021-04-07 Issue Date: 2021-04-07 Report No.: BCTC2103491100-1E Test Standards FCC Part15.209 ANSI C63.10-2013 Test Results PASS Tested by: Approved by: Sam zeng/Project Handler Zero Zhou/Reviewer Report No.: BCTC2103491100-1E No.：BCTC/RF-EMC-005 Page 3 of 22 Edition：A.3 TABLE OF CONTENT Test Report Declaration Page 1. VERSION ............................................................ 4 2. TEST SUMMARY ..................................................... 5 3. MEASUREMENT UNCERTAINTY ....................................... 6 4. PRODUCT INFORMATION AND TEST SETUP............................ 7 4.1 Product Information ..................................................... 7 4.2 Test Setup Configuration ................................................ 7 4.3 Support Equipment ..................................................... 8 4.5 Test Mode ............................................................. 8 5. TEST FACILITY AND TEST INSTRUMENT USED ......................... 9 5.1 Test Facility ............................................................ 9 5.2 Test Instrument Used ................................................... 9 6. CONDUCTED EMISSIONS ............................................ 11 6.1 Block Diagram Of Test Setup ............................................ 11 6.2 Limit ................................................................. 11 6.3 Test procedure ........................................................ 11 6.4 EUT operating Conditions ............................................... 11 6.5 Test Result ........................................................... 12 7. RADIATED EMISSIONS .............................................. 14 7.1 Block Diagram Of Test Setup ............................................ 14 7.2 Limit ................................................................. 15 7.3 Test procedure ........................................................ 15 7.4 Test Result ........................................................... 17 8. EUT PHOTOGRAPHS ................................................ 20 9. EUT TEST SETUP PHOTOGRAPHS .................................... 21 (Note: N/A means not applicable) Report No.: BCTC2103491100-1E No.：BCTC/RF-EMC-005 Page 4 of 22 Edition：A.3 1. VERSION Report No. Issue Date Description Approved BCTC2103491100-1E 2021-04-07 Original Valid Report No.: BCTC2103491100-1E No.：BCTC/RF-EMC-005 Page 5 of 22 Edition：A.3 2. TEST SUMMARY The Product has been tested according to the following specifications: No. Test Parameter Clause No Results 1 Conducted Emission 15.207 PASS 2 Radiated Emission 15.209 PASS 3 Antenna Requirement 15.203 PASS Report No.: BCTC2103491100-1E No.：BCTC/RF-EMC-005 Page 6 of 22 Edition：A.3 3. MEASUREMENT UNCERTAINTY Where relevant, the following measurement uncertainty levels have been estimated for tests performed on the Product as specified in CISPR 16-4-2. This uncertainty represents an expanded uncertainty expressed at approximately the 95% confidence level using a coverage factor of k=2. No. Item Uncertainty 1 3m camber Radiated spurious emission(30MHz-1GHz) U=4.3dB 2 Conducted Emission (150kHz-30MHz) U=3.2dB 3 humidity uncertainty U=5.3% 4 Temperature uncertainty U=0.59°C Report No.: BCTC2103491100-1E No.：BCTC/RF-EMC-005 Page 7 of 22 Edition：A.3 4. PRODUCT INFORMATION AND TEST SETUP 4.1 Product Information Model/Type Ref.: B650 BS001, B688, B651,B652,B653,B654,B655,B656,B657,B658,B659, B660 Model differences: All the model are the same circuit and RF module, except model names. Product Description: Power Bank Operation Frequency: 115kHz-205kHz Antenna installation: Inductive loop coil antenna Ratings: Micro USB Input: DC 5V2.4A, 9V2A (Max) USB-C Input: DC 5V2.4A, 9V2A (Max) USB-C Output: DC 5V2.4A, 9V2.2A, 12V1.6A (Max) USB-A Output: DC 5V3A, 9V2A, 12V1.5A (Max) Wireless Output: 10W (Max) Hardware Version: N/A Software Version: N/A 4.2 Test Setup Configuration See test photographs attached in EUT TEST SETUP PHOTOGRAPHS for the actual connections between Product and support equipment. Conducted Emission/Radiated Spurious Emission: E-2 Dummy Load E-1 EUT AC E-3 Resistance Report No.: BCTC2103491100-1E No.：BCTC/RF-EMC-005 Page 8 of 22 Edition：A.3 4.3 Support Equipment No. Device Type Brand Model Series No. Data Cable Remark E-1 Power Bank Choetech B650 BS001, B688, B6 51,B652,B653,B 654,B655,B656, B657,B658,B659 ,B660 N/A EUT E-2 Dummy load N/A DL01 N/A N/A Auxiliary Notes: 1. All the equipment/cables were placed in the worst-case configuration to maximize the emission during the test. 2. Grounding was established in accordance with th…

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Report No.: BCTC2103491100E Test Report Tel: 400-788-9558 Web: https://www.bctc-lab.com BCTC/RF-EMC-007 Ver.：A.0 Page 1 of 2 1. EUT TEST SETUP PHOTOGRAPHS Spurious emissions Report No.: BCTC2103491100E Test Report Tel: 400-788-9558 Web: https://www.bctc-lab.com BCTC/RF-EMC-007 Ver.：A.0 Page 2 of 2 Conducted emissions ※※※※※ END OF REPORT ※※※※※