The corresponding battery cover allows rider to cleanly upgrade to the larger EnergyPak Smart 800 battery.Features:- To upgrade from an EnergyPak Smart 500, or 625 battery to an EnergyPak Smart 800 battery, a specific battery cover is required.Specifications:- Material: PA 6 GF30 (30 % glass fiber reinforced polyamide)- Weight: 243 gCompatibility Guide for Cover Type B: - Stance E+ (MY19-22)- Stance E+ Pro (MY20-22)- Embolden E+ (MY19-22)- Trance SX E+ Pro (MY19)- Trance E+ Pro (MY19-20)- Intrigue E+ Pro (MY19-20)