power 4dDurapower Group offers closed-loop, end-to-end Energy Storage Solutions for a variety of e-mobility, specialty, and stationary applications. Focusing on the manufacturing, research,To find the focal length of the combination of two thin lenses in contact, we can follow these steps: Step 1: Identify the Powers of the Lenses We have two lenses: - Lens 1 has a power ( P1 = +4