Some leaf blowers also have a vacuum function, and are available in cordless and petrol powers.
It's important to remember that whilst the vacuum function exists, it's not designed for collecting large quantities of leaves. It's always quicker and easier to blow most of the leaves into a pile then pick them up and bag them, then use the vacuum to finish off.
You can also use the vacuum function where using a blower wouldn't be practical, for example around shrubs in a border. We'd also recommend against vacuuming wet leaves, as the tubes and collection bag can become clogged and reduce performance.