FENLI is an established industry leader in long-life rechargeable battery integration and electronic personal care equipment. Operating high-precision battery testing labs and automated SMT production facilities, FENLI manufactures high-reliability Rechargeable Eye Massager devices designed for global distribution. Every battery cell undergoes rigorous charge-discharge cycle testing, thermal runaway protection validation, and overcharge prevention testing to guarantee maximum safety and long operational lifespans. Certified under ISO9001, ISO13485, CE, FCC, and RoHS standards, FENLI supports OEM/ODM brand partners with complete custom solutions, including custom battery capacities, custom shell colors, logo laser engraving, and custom retail packaging. Our production capacity exceeds 180,000 units monthly, offering unmatched supply chain stability and factory-direct value for international B2B clients.