I use a Black and Decker Flex compact cordless handheld unit, which is powerful and effective and which can be used for small jobs in the house as wellas for car interiors. Much more convenient than using a full-size plug-in vacuum with a hose attachment.

My recommendation would be to not do this - yes they are convenient but they have no suction power.

My car inside is so dirty with crumbs etc because I have 3 kids eating inside. Any recommebdation for small, lighweight car vaccum cleaner, best is cordless or use the car plug.