【High-Quality Fireproof】This safety battery case features a four-layer protection system made of fiberglass and flame-retardant insulation (heat resistant up to 1400°C). A waterproof outer silicone layer provides reliable moisture protection and prevents short circuits. This material offers optimal protection in case of overheating or explosion. 【Universal E-bike Battery】With dimensions of 49 x 15 x 15 cm, it provides ample space for common battery models such as PowerPack 750, 625, and 500. The well-thought-out design ensures secure installation for batteries of various sizes and shapes. 【Secure Charging Closure】A double closure system (hook-and-loop fastener + zipper) ensures maximum safety during charging. In the event of a battery fire, this special design will slow the spread of flames and harmful gases. 【Safe Transport】Two non-slip silicone clips securely hold the battery during transport. A sturdy handle makes carrying more comfortable. (Note: Shoulder strap is not included in this set) 【Safety First】Always unplug the power source after charging! Never leave the battery unattended during charging. For safety reasons, store the product in a well-ventilated area, away from flammable materials.