Usage Tips:Improve bicycle performance: Similar to smartphones, lithium-ion batteries will not last as long as usual at low temperatures. If you dont want to lose power on cold days, a cold shield made of 4.5 mm thick insulating neoprene is the best solution.Universal fit: The shell is tailor-made to fit most of the leading brands of frame batteries. Whether it is suitable for Bosch, Shimano or other brands, the protective battery cover fits perfectly and does not slide when riding. Appropriate frame circumference: 28-32 cm.Reliable all-round protection: scratches, stone chips and dirt are now a thing of the past. The neoprene cover provides reliable protection and is easy to clean at low water temperatures.Elegant design: Due to the use of elastic materials, the battery protection cover is well-made and fits perfectly with the frame. The black matte finish is also a real eye-catching highlight on your bike.Important note: We recommend using the lid only when the outdoor temperature is below 15 Celsius. In addition, you should remove it while charging to prevent the battery from overheating.Product name: Electric bicycle lithium battery protector Colour:blackMaterial:NeoprenePackage Contents:1 x lithium battery protective coverOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.