2BWZ5-XW04S015Lithium Iron Phosphate Battery

Shenzhen Chengyue Energy Co., Ltd. Room 605-1, Blk B, Bldg 3, Huaqiang Creative Park, Biyan, Guangming, Shenzhen City, China U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: Jul. 11, 26 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID:2BWZ5-XW04S015 [Shenzhen Chengyue Energy Co., Ltd.] (“the applicant”) certifies that, as of the date of the filing of the application, [MIRAMONT SOLUTIONS LLC] (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. [MIRAMONT SOLUTIONS LLC] ("the agent) understand it is the agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address. Designated U.S. Agent Company Name: MIRAMONT SOLUTIONS LLC FRN: 0036313369 Address:19 GEORGETOWN, IRVINE, CA92612 United States Signature: Contact Person: Wenyi Wang Tel: 951 401 3633 Email: [email protected] Applicant Company Name: Shenzhen Chengyue Energy Co., Ltd. FRN: 0038638375 Address: Room 605-1, Blk B, Bldg 3, Huaqiang Creative Park, Biyan, Guangming, Shenzhen City, China Signature: Contact Person: Mark Chu Tel: 0086 0755-88659501 Email: [email protected]

Attestation Statement. Old Code: C5266091 24 New Code: 00015544 Ed.3 Change reason: FRN is added to the Applicant information section. 1/1 TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 The Commission adopted rules that prohibit equipment authorization for “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List 1 , which is periodically updated. See the Covered List for more details. This Attestation Statement is to confirm that we follow the Section 2.911(d)(5)(i)-(ii) Applicant Company name: Shenzhen Chengyue Energy Co., Ltd. Grantee code: 2BRGD FCC ID: 2BWZ5-XW04S015 FRN: 0037364841 Contact Name: Mark Chu Address: Room 605-1, Blk B, Bldg 3, Huaqiang Creative Park, Biyan, Guangming, Shenzhen City, China Telephone No: 0086 0755-88659501 Fax No: 0086 0755-88659501 Email: [email protected] i. [Shenzhen Chengyue Energy Co., Ltd.] (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. The applicant must sign this certification. ii. [Shenzhen Chengyue Energy Co., Ltd.] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant [is not] (as a specifically named entity or any of its subsidiaries or affiliates) identified on the Covered List as an entity producing “covered” equipment. The applicant must sign this certification. Date: 2026/7/ [[Shenzhen Chengyue Energy Co., Ltd. ] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant [is / is not] identified on the Covered List as an entity producing “covered”equipment . 11 Applicant’s Name: Shenzhen Chengyue Energy Co., Ltd. Title: Manager 1 The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist Attestation Statement. Old Code: C5266091 24 New Code: 00015544 Ed.3 Change reason: FRN is added to the Applicant information section. 1/1 Signature

Shenzhen Chengyue Energy Co., Ltd. Code 00018768 Ed. 1 Item 1. The device is able to install software/program installation? ☐ Yes, go to Item 2. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky cybersecurity or anti-virus software. Device Lithium Iron Phosphate Battery Company name Shenzhen Chengyue Energy Co., Ltd. Grantee code 2BWZ5 FCC ID 2BWZ5-XW04S015 FRN 0038638375 Contact name Mark Chu Address Room 605-1, Blk B, Bldg 3, Huaqiang Creative Park, Biyan, Guangming, Shenzhen City, China Telephone number 0086 0755-88659501 E-mail [email protected] Chipset/module information N32W1B452RE Operating System (if applicable) N/A Storage Capacity (hard drive or other permanent memory storage, if applicable) N/A 2 Item 2. Technical Requirements for Kaspersky Cybersecurity Software: # General Requirements (For all Devices) Yes / No or N/A Comments 1 Internet connection for activation and updates (For all Operating Systems) N/A # General Requirements (For Windows Devices) Yes / No or N/A Comments 1 Storage: 1500 MB free space on the hard drive N/A 2 Operating System: Microsoft Windows 8, 8.1, 10 & 11 Home / Pro / Enterprise Microsoft Windows 7 Starter / Home Basic & Premium / Professional / Ultimate SP1 or higher N/A 3 Processor: 1 GHz or higher (x86 or x64) N/A 4 Memory (RAM)1 GB (32-bit) or 2 GB (64-bit) N/A 5 Screen Resolution: Minimum resolution of 1024 x 768 N/A # General Requirements (For macOS devices) Yes / No or N/A Comments 1 Operating System macOS® 13 – 14 N/A 2 Memory (RAM)4 GB N/A 3 Storage: 3455 MB free space on the hard drive N/A 3 # General Requirements (For Android Devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: Android™ 10 – 14 N/A 3 Screen Resolution: Minimum resolution of 320 x 480 N/A # General Requirements (for iOS devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: iOS® 17 N/A # General Requirements (For Linux system) Yes / No or N/A Comments 1 Hard drive: 1 GB of free space N/A 2 CPU: Intel Pentium 1 GHz or higher 3 RAM: 1 GB 4 Minimum software requirements: AlmaLinux OS 8 or later; AlterOS 7.5 or later; Astra Linux Common Edition 2.12 or later; CentOS 6.7 or later; Debian GNU/Linux 10.0 or later; EulerOS 2.0 or later; Oracle Linux 7.3 or later ; Red Hat Enterprise Linux 6.7 or later ; Rocky Linux 8.5 or later ; SUSE Linux Enterprise Server 12.5 or later; Ubuntu 12.04 or later ; N/A N/A N/A 4 Uncom OS Home / Business / Education / Enterprise 2.2 or later; ALT Linux Workstaton / Workstation K / Server / Education 8 or later; ROSA Linux Workstation / Server 12 or later ; RED OS 7.3 and later ; After reviewed the technical requirements, is the device capable of supporting the installation of Kaspersky software? ☐ Yes, go to Item 3. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky software Item 3. Connectivity Capabilities: # Physical Interface Purpose Justification 1 1 # Wireless Interface Purpose Justification 1 1 After the review of this items, the device: ☒ Cannot support installation of any cybersecurity or anti-virus software on the covered list. ☐ Potentially can operate with any cybersecurity or anti-virus software on the covered list – additional third- party proof is provided to demonstrate compliance with requirements as of 2.911(d)5(i),(ii) – “Proof of Compliance with Covered List Software Requirements” of this document applies Signature: Name: Mark Chu Date:2026/7/11 1 The justification field is used to justify why the software cannot be received through that interface. Check the annex for more indications.

Shenzhen Chengyue Energy Co., Ltd. Model Difference Product description: Lithium Iron Phosphate Battery Model name: 12V100Ah, 12V7Ah, 12V8Ah, 12V9Ah, 12V10Ah, 12V12Ah, 12V15Ah, 12V18Ah, 12V20Ah, 12V24Ah, 12V30Ah, 12V40Ah, 12V50Ah, 12V60Ah, 12V80Ah, 12V120Ah, 12V150Ah, 12V200Ah, 12V300Ah, 12V400Ah Trade Name: N/A FCC ID:2BWZ5-XW04S015 We (Ningbo Forever Electronic Appliance Co., Ltd) Hereby state that all the models are electrical identical including the same software parameter and hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.,), same mechanical structure and design (including product enclosure, materials, etc.,), the only difference is the model name. Regards Sincerely Client’s signature: Client’s name / title: Mark Chu / Manager Contact information / address: Room 605-1, Blk B, Bldg 3, Huaqiang Creative Park, Biyan, Guangming, Shenzhen City, China

TCBCALLpágina1 FileFCCID:2BWZ5-XW04S015 PleaseuploadanexhibitthatexplainshowdoestheTCBverifythenewagentinformation: 1-IstheaddressoftheagentavalidphysicalUSmailingaddress(notaUSpostofficebox,notavirtualmailbox,notP.O.Boxes,notavacantlot,notapublicbuilding, etc.) ○Wehavecheckediftheaddressexistsinarealandpotentialbuilding(Googlemaps)+officialUSregister,afterthisverificationandtheevidencebelowwecan guaranteethefollowing: notaUSpostofficebox notavirtualmailbox notP.O.Boxes notavacantlot notapublicbuilding(note) ►WecheckedtheFCCFRNSearchbasedontheinformationprovidedbythegrantee. Ontheofficialregisterfrom:https://bizfileonline.sos.ca.gov/search/business TCBCALLpágina2 Ingoogle: TCBCALLpágina3 ►CONCLUSIONbyTCB:TheASOPdefinedandprovidedbygranteeisVALIDandconfirmed.Thereforetheexhibit"C5266091_X23_Ed1_US_Agent_Letter" includedinthefileisok. 2-IstheagentphysicallylocatedatthatvalidUSaddresssuchthattheagentcanbelegallyservedatthataddress? Yes,checkabove 3-Hasthelistedagentclearlyagreedinwritingtoserveastheagentforthegranteeatthataddress? Yes,itisincludedintheexhibit"C5266091_X23_Ed1_US_Agent_Letter" >

C5266091_X10_Ed.2 1/1 < Shenzhen Chengyue Energy Co., Ltd.> Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2026.7.11 Subject: Request for Confidentiality FCC ID: 2BWZ5-XW04S015 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location No No Attestation Statement No No External Photos No ☐ Block Diagram ☒ ☐ Schematics ☒ ☐ Test Report No No Test Setup Photos No ☒ User’s Manual ☐ NOTE 1 ☒ Internal Photos ☐ NOTE 1 ☒ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No NOTE 1: Long-Term Confidentiality may be permitted under special conditions (See II. LONG-TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short-Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of __45_ days from the date of the Grant of Equipment Authorization and prior to marketing. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. C5266091_X10_Ed.2 1/1 Sincerely, Signature: Name:Mark Chu Title: Manager

C5266091_X8_Ed.1 1/1 Letter of Authorization < Shenzhen Chengyue Energy Co., Ltd.> Company: Shenzhen Chengyue Energy Co., Ltd. Address: Room 605-1, Blk B, Bldg 3, Huaqiang Creative Park, Biyan, Guangming, Shenzhen City, China Product Name: Lithium Iron Phosphate Battery Model Number: 12V100Ah, 12V7Ah, 12V8Ah, 12V9Ah, 12V10Ah, 12V12Ah, 12V15Ah, 12V18Ah, 12V20Ah, 12V24Ah, 12V30Ah, 12V40Ah, 12V50Ah, 12V60Ah, 12V80Ah, 12V120Ah, 12V150Ah, 12V200Ah, 12V300Ah, 12V400Ah FCC Identifier: 2BWZ5-XW04S015 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Mark Chu Date: 2026.7.11 Title: Manager Signature of applicant:

FCC ID:2BWZ5-XW04S015 EUT PHOTO(External Photos) FCC ID:2BWZ5-XW04S015 FCC ID:2BWZ5-XW04S015

Label & label location 20mm*10mm FCC ID:2BWZ5-XW04S015 Label location

FCC ID:2BWZ5-XW04S015 RF EXPOSURE EVALUATION Limits According KDB 447498 D01 General RF Exposure Guidance v06. The RF exposure evaluation requirements of §2.1091 for mobile device exposure conditions subject to MPE limits: Requirements of this section are a consequence of Commission responsibilities under the National Environmental Policy Act to evaluate the environmental significance of its actions. See subpart I of part 1 of this chapter, in particular § 1.1307(b). For purposes of this section, the definitions in § 1.1307(b)(2) of this chapter shall apply. A mobile device is defined as a transmitting device designed to be used in other than fixed locations and to generally be used in such a way that a separation distance of at least 20 centimeters is normally maintained between the RF source's radiating structure(s) and the body of the user or nearby persons. In this context, the term “fixed location” means that the device is physically secured at one location and is not able to be easily moved to another location while transmitting. Transmitting devices designed to be used by consumers or workers that can be easily re-located, such as wireless devices associated with a personal desktop computer, are considered to be mobile devices if they meet the 20-centimeter separation requirement. The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in 1.1307(b). Limits for Maximum Permissible Exposure (MPE) Frequency range (MHz) Electric field strength (V/m) Magnetic field strength (A/m) Power density (mW/cm 2 ) Averaging time (minutes) (A) Limits for Occupational/Controlled Exposures 0.3–3.0 614 1.63 *(100) 6 3.0–30 1842/f 4.89/f *(900/f 2 ) 6 30–300 61.4 0.163 1.0 6 300–1500 f/300 6 1500–100,000 5 6 (B) Limits for General Population/Uncontrolled Exposure 0.3–1.34 614 1.63 *(100) 30 1.34–30 824/f 2.19/f *(180/f 2 ) 30 30–300 27.5 0.073 0.2 30 300–1500 f/1500 30 1500–100,000 1.0 30 f = frequency in MHz Friis transmission formula: Pd = (Pout*G)/(4*pi*r 2 ) Where Pd = power density in mW/cm 2 , Pout = output power to antenna in mW; G = gain of antenna in linear scale, Pi = 3.1416; R = distance between observation point and center of the radiator in cm Pd id the limit of MPE, 1 mW/cm 2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. Test Result of RF Exposure Evaluation EDR Mode Output power to antenna (dBm) Tune UP tolerance (dBm) Max Tune UP power (dBm) Max Tune UP power (mW) Power Density at R=20cm (mW/cm2) Limit (mW/cm2) Result GFSK -1.27 -1±1 0 1.00 0.00017 1.0 PASS Antenna gain: -0.58dBi

Report No.: ZKT-260630L2296E Page 1 of 40 FCC TEST REPORT FCC ID:2BWZ5-XW04S015 Report Number. ................................ : ZKT-260630L2296E Date of Test ................................................. : Jun. 17, 2026 to Jul. 01, 2026 Date of issue .................................... : Jul. 01, 2026 Total number of pages ....................... 40 Test Result ...................................... : PASS Testing Laboratory. ........................ : Shenzhen ZKT Technology Co., Ltd. Address .......................................... : 1/F, No. 101, Building B, No. 6, Tangwei Community Industrial Avenue, Fuhai Street, Bao'an District, Shenzhen, China Applicant's name .......................... : Shenzhen Chengyue Energy Co., Ltd. Address .......................................... : Room 605-1, Blk B, Bldg 3, Huaqiang Creative Park, Biyan, Guangming, Shenzhen City, China Manufacturer's name ................... : Shenzhen Chengyue Energy Co., Ltd. Address .......................................... : Room 605-1, Blk B, Bldg 3, Huaqiang Creative Park, Biyan, Guangming, Shenzhen City, China Test specification: Standard ........................................... : FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10-2020 + Cor. 1-2023+C63.10a-2024 + Errata to C63.10a-2024 Test procedure ................................. : / Non-standard test method .............. : N/A Test Report Form No. ..................... : TRF-EL-111_V0 Test Report Form(s) Originator ..... : ZKT Testing Master TRF .................................... : Dated: 2020-01-06 This device described above has been tested by ZKT, and the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in full, without the written approval of ZKT, this document may be altered or revised by ZKT, personal only, and shall be noted in the revision of the document. Product name ................................. : Lithium Iron Phosphate Battery Trademark ...................................... : N/A Model/Type reference ...................... : 12V100Ah 12V7Ah, 12V8Ah, 12V9Ah, 12V10Ah, 12V12Ah, 12V15Ah, 12V18Ah, 12V20Ah, 12V24Ah, 12V30Ah, 12V40Ah, 12V50Ah, 12V60Ah, 12V80Ah, 12V120Ah, 12V150Ah, 12V200Ah, 12V300Ah, 12V400Ah Ratings ............................................. : Input: 14.4V 100A Output: 12.8V 100A Report No.: ZKT-260630L2296E Page 2 of 40 Testing procedure and testing location: Testing Laboratory ................................... : Shenzhen ZKT Technology Co., Ltd. Address ...................................................... : 1/F, No. 101, Building B, No. 6, Tangwei Community Industrial Avenue, Fuhai Street, Bao'an District, Shenzhen, China Jim Liu Tested by (name + signature) .................... : Jackson Fang Reviewer (name + signature) ..................... : Lake Xie Approved (name + signature) .................... : Report No.: ZKT-260630L2296E Page 3 of 40 Table of Contents Page 1.VERSION ....................................................................................................................... 5 2. SUMMARY OF TEST RESULTS ................................................................................... 6 2.1 TEST FACILITY ................................................................................................................................. 7 2.2 MEASUREMENT UNCERTAINTY .................................................................................................... 7 3. GENERAL INFORMATION ........................................................................................... 8 3.1 GENERAL DESCRIPTION OF EUT ................................................................................................. 8 3.2 DESCRIPTION OF TEST MODES ................................................................................................... 9 3.3 BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED ............................ 10 3.4 DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) ...................................................... 10 3.5 EQUIPMENTS LIST FOR ALL TEST ITEMS .................................................................................. 11 4. EMC EMISSION TEST ................................................................................................ 13 4.1 CONDUCTED EMISSION MEASUREMENT ................................................................................. 13 4.1.1 POWER LINE CONDUCTED EMISSION Limits ...................................................................... 13 4.1.2 TEST PROCEDURE ................................................................................................................... 13 4.1.3 DEVIATION FROM TEST STANDARD ..................................................................................... 13 4.1.4 TEST SETUP .............................................................................................................................. 14 4.1.5 EUT OPERATING CONDITIONS ............................................................................................... 14 TEST RESULT ..................................................................................................................................... 15 4.2.1 RADIATED EMISSION LIMITS .................................................................................................. 17 4.2.2 TEST PROCEDURE ................................................................................................................... 17 4.2.3 DEVIATION FROM TEST STANDARD ..................................................................................... 18 4.2.4 TEST SETUP .............................................................................................................................. 18 4.2.5 EUT OPERATING CONDITIONS .....................................................................…

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Inverted F Antenna Specification Summary ITEMANT SPEC Model Name2.4G ANT Center Frequency HorizontalVertical 2400MHz2450MHz2500MHz2400MHz2450MHz2500MHz -1.26-0.77-0.58-5.25 -2.47-1.86 MAX. Gain -0.58dB PolarizationHorizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance50 Ohm Antenna Length39mm ManufactureZHUHAI JIELI TECHNOLOGY CO.,LTD Address: At No. 333, Kexing Road, Xiangzhou District, Zhuhai City, China. AntennaPhoto&Length(mm) Horizontal:2400MHz2450MHz2500MHz Power(dBm) Max:0Min:-40Scale:5/div Frequency (MHz) Gain(dB) MaxMinAvg 2400-1.26174-30.0801-7.18716 2450-0.765802-36.5604-7.48023 2500-0.585582-22.0315-6.59127 Vertical:2400MHz2450MHz2500MHz Power(dBm) Max:0Min:-30Scale:5/div Frequency (MHz) Gain(dB) MaxMinAvg 2400-5.2537-22.1424-12.4294 2450-2.4652-24.5837-10.4702 2500-1.86120-29.5214-9.20432 ANTTestLabs ： AttestationofGlobalComplianceCo.,Ltd.