I’ve seen electricity being measured for like houses and stuff with kWh, but i always see on batteries it’s measured with mAh. what’s the difference? also, is there such thing as Volt-hours?
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No, there’s no such thing as volt-hours. Your home should always be at 120 volts (north america), even if nothing is plugged in at all. Voltage is always present on the wires assuming nothing’s wrong (power outage, etc).
Logically, as long as the voltage doesn’t change, volt-hours and amp-hours are functionally identical up to that voltage multiplier. In practice it’s a matter of how you choose to measure the power. A battery would normally measure its output in amps because a sensor monitoring the battery would measure it that way. In your home we use watts because appliances are usually rated in watts, allowing for fairly easy math.
Does it matter? Not really, if you know the formula.
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