What source of electrical energy do you prefer to your personal electronic device batteries or power cod?

I prefer using batteries for my personal electronic devices because they offer portability and convenience, allowing me to use my devices anywhere without being tethered to a power outlet. Additionally, advancements in battery technology have significantly improved energy density and charging speed. However, when stationary, I do appreciate the efficiency and sustainability of power cords, especially if they are connected to renewable energy sources. Ultimately, the choice depends on the context of use.