The extra batteries for the flashlight 'came in handy' [=were useful] when the electricity went off.
He always liked to keep a dictionary 'handy'. [='on hand, nearby']
('Brit') My flat is 'handy for' [=near to] the underground.
(..) two days from now, two months from now... hell, two years from now, just know there's no statute of limitations on this. Keep that hatchet handy. You're gonna need it if he turns up with you people. And it won't turn out the way it did for your boy. What happened to the pantry? (..)2017 TvShow: The Walking Dead Title: Rock in the Road Season: 7 Episode 9