[jerry80]

>It makes a lot of sense to specify energy in Wh in electrical engineering. It's much easier to convert to other useful measurements involving volts, amps, and watts than joules are.

Easier how? A watt-hour is just 3600 joules - the number of seconds in an hour.

1 joule = 1 volt * 1 amp * 1 second

1 watt-hour = 1 volt * 1 amp * 3600 seconds