At 2.30pm yesteday, the jury told the judge they were struggling to reach unanimous verdicts on the 28 charges.
Justice Helen Cull allowed the jury to give majority verdicts, if there was an eleven-to-one split.
An hour-and-a-half later, the jury returned to the courtroom, telling Justice Cull they were still unable to make a decision on the verdicts - despite being given the ability to make a majority decision.
Hebberley was facing 28 offences including rape, sexual violation by unlawful sexual connection, injuring with intent, assault with intent, male assaults female, assault with a weapon, kidnapping, threatening to kill, intimidation and threatening grievous bodily harm.
During the week-long trial, the Crown presented evidence to the jury that the 20 year old branded his partner with hot wire, burnt her with lighters, cigarette butts and candle wax, intentionally dislocated her limbs, and locked her in a small room with a dangerous dog for two hours.
It was also claimed he punched, kicked and strangled her, assaulted her with a knife, cups, plates and an X-box controller, threatened to kill her, and kidnapped her.
The grievous bodily harm charges were laid after Hebberley allegedly threatened the complainant and her father with a knife, during a volatile incident when the pair split up last year.
The defence argued that both the violence was in self-defence or simply didn't happen, and all sexually activity between the pair was consented to it all the way through.
In the end, the jury was unanimous in all 28 verdicts.
The jury decided Hebberley was guilty of 13 charges including male assaults female, injuring with intent to injure, sexual violation, threatening to kill, and two counts of threatening to do grievous bodily harm.
Among the evidence they've accepted from the Crown's case was that Hebberley kicked, punched, bit and strangled his partner, dislocated her hip joints, dragged her along the carpet causing carpet burns, and threatening his partner and her father with a knife on the night the relationship ended.
The jury gave not guilty verdicts to 15 charges, including male assaults female, assault with a weapon, intimidation, rape and kidnapping.
Among the allegations the jury rejected included that Hebberley burnt her with a cigarette lighter, candle wax or a hot wire, or locked her in a wash house for two hours with a dangerous dog.
Hebberley has been remanded in custody, to reappear for sentencing on the 13 charges in December.