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Smart 3-Level Heating: Easily activate (or deactivate) the heating function with a long press, and switch between fast, medium, and low heating speeds with a single touch. The advanced system automatically shuts off when the temperature reaches a safe 60°C (140°F) to prevent overheating, ensuring battery safety and efficient operation. Extended Winter Riding Range: Say goodbye to the cold! This protective cover actively heats the battery, effectively counteracting significant power loss and voltage drop caused by low temperatures. By maintaining the optimal operating temperature, it significantly extends the range of your e-bike during winter commutes. All-Weather Protection with Reflective Logo: The outer layer is made of high-quality 420D nylon + TPU + PU composite material, providing comprehensive waterproof and dustproof protection and is easy to wipe clean. Integrated reflective logos improve your visibility when riding at dusk or at night. Universal Design with 360° Shock Protection: This protective cover is highly compatible and suitable for most e-bike batteries (minimum circumference: 26 cm/10.2 inches, maximum circumference: 44.5 cm/17.5 inches – please measure your battery size first). The 5mm thick foam lining provides comprehensive cushioning protection, effectively absorbing bumps and vibrations. Powered by Power Bank: Enjoy portable heating functionality using a standard power bank (sold separately, 5V output required). This convenient design makes it the ultimate convenient solution for ensuring stable battery performance and extending range during winter riding.