• Universal fit: Designed to fit most bicycle battery brands, ensuring a perfect fit without slipping. Compatible with batteries from 28-32 cm. • Sleek design: Made with elastic materials that fit the battery perfectly, with a black finish that complements your bike's style. • Performance enhancement: Protects lithium-ion batteries in low temperatures, maintaining optimal performance with a 4.5 mm insulating neoprene thickness. • Comprehensive protection: Protects against scratches, stones, and dirt. Easy to clean even at low water temperatures. • Usage recommendation: Use the cover only at outdoor temperatures below 15 degrees Celsius and remove it during charging to prevent overheating.