Batman is one of the few members of the Justice League to not have powers, but he's not alone, as the other very prominent member is Oliver Queen, aka the Green Arrow.
Like Batman, Green Arrow relies on precision, ingenuity, and his training to take down bad guys. In Arrow's case that's usually with his bow and near endless supply of trick arrows. Much like Batman has a solution for everything in his utility belt, Green Arrow has almost everything he needs in his quiver.
Green Arrow and Batman don't always get along, as they often try and one-up each other to see who's the better "non-powered" hero. But when the need is there, they'll always work together to save the day.