The 4.25V 21000F Supercapacitor Battery is a high-performance energy storage solution designed for Uninterruptible Power Supplies (UPS) and other critical power backup applications. Featuring ultra-high capacitance, rapid charge/discharge capabilities, and exceptional cycle life, this supercapacitor ensures reliable, stable power delivery in demanding environments. Built with advanced graphene materials, it offers low ESR (1mΩ), wide operating temperature range (-20°C to +65°C), and customizable voltage tolerance (5%~20%), making it ideal for industrial energy storage, renewable energy systems, and smart grid applications. With a compact, durable design and a 3-year warranty, this GH brand supercapacitor delivers superior safety, efficiency, and long-term performance in a lightweight, eco-friendly package.More