INJURED STATED THAT HE WAS ATTEMPTING TO HELP ANOTHER EMPLOYEE RAISE THE BATTERY LIDS ON THE #4 SCOOP. WHEN THE EE TURNED LOOSE OF THE LID HIS FINGER WAS CAUGHT UNDER THE LID CAUSING A FRACTURE & LACERATION TO THE FIRST KNUCKLE OF THE RING FINGER ON HIS RT. HAND. INJURED WAS WEARING GLOVES & HE RETURNED TO WORK THE NEXT SCHEDULED SHIFT.