What voltage is your laptop battery? Your smartphone battery? Your Anker power bank battery? What voltage are they outputting over USB-C PD? The Volts and Amp

What voltage is your laptop battery? Your smartphone battery? Your Anker power bank battery? What voltage are they outputting over USB-C PD? The Volts and Amp-hours (not amp/hours) metrics make sense when comparing raw battery cells, but when integrated into a device where the voltage is unknown or variable output for charging different devices, it becomes less relevant. Watt-hours tells you the total energy. A laptop with more Watt-hours has more battery than one with fewer Watt-hours, all in a single unit without needing to multiply things together.