This product is designed to securely hold the battery in place. The battery hold-down plate (fit size 181×50mm) and bottom fixing bar are made of high-quality aluminium 7075-T6 for greater sturdiness and rigidity. When installing the bottom fixing bar, four holes need to be drilled with a 4.0 drill bit to enhance the firmness of the battery hold-down. The product is equipped with Velcro and features an open design that is compatible with batteries of different sizes and capacities, allowing for flexible adjustment and preventing the battery from falling off.