Don’t throw away those old laptop batteries! This “Frugal Function” hack demonstrates how you can safely salvage and repurpose 18650 lithium-ion cells from discarded laptop battery packs to create low-cost, functional energy storage for your frugal solar projects. We’ll cover safety precautions, testing methods, and simple ways to configure them for small lighting systems or phone charging banks. Turn “waste” into valuable power for your home.
