It happened August 8 on the corner of Schenectady Avenue and Bergen Street in Crown Heights.
Surveillance video released by the NYPD shows the 34-year-old victim being attacked by a man walking in her direction.
She is thrown against a parked car and placed in a choke hold until she gives up her backpack.
The man says something to her before escaping with her cellphone and an iPad.
The victim suffered bruises and cuts to her face neck and body.
Bergen Street looks safe enough in daylight, but residents say late at night it can feel a lot different.
"We've complained as a neighborhood for more lights," Jove Meyer said. "Police always say that crime happens in the darkness, but then they don't make effort to make it brighter. So make our streets safer."
The video shows the suspect has a beard He was wearing dark clothing and red sneakers and was last seen running west on Bergen Street
Anyone with information is asked to call NYPD Crime Stoppers at 800-577-TIPS.