Cops are hunting a pair of iPhone robbers who savagely beat a teen with a pistol during a two-hour crime spree in Brooklyn.

The crooks' first victim was a 13-year-old girl they approached on E. 86th St. near Flatlands Ave. in Canarsie about 3:45 p.m. on April 1. They pried her iPhone away and ran off, police said.

They next struck just half a block away near Avenue J and E. 86th St. when they tried to rob a 20-year-old man about 5:25 p.m. but wound up fleeing empty-handed, cops said.

They quickly found another victim a few blocks away. One robber struck a 16-year-old boy in the head nine times with a black pistol while his partner rifled through the boy's belongings on Avenue K near E. 92nd St. about 5:50 p.m., officials said.

The boy was on his back during the pummeling and raised one leg defensively in the air.

Police released surveillance footage of the attack on Tuesday and are asking the public's help tracking the pair down.

The suspects are both described as black, in their late teens, about 5-foot-7 and wearing dark clothes.

Anyone with information is asked to call Crime Stoppers at (800) 577-TIPS.