The PowerCore II 10000 takes full advantage of its high-grade materials to make an effortlessly functional and remarkably attractive portable battery. 1. Strong, light, and durable, anodized aluminum is the same material used in flagship smartphones. It contributes to a minimal design while providing sleek looks that quietly hide the PowerCore II 10000’s true power. 2. TPU silicone will not scratch metallic finishes and provides a non-slip surface for phone and battery to sit safely next to each other. Ideal for single-hand use.