A new defibrillator the size of a mobile phone has been launched by Hato Hone St John, which it says will make life-saving treatment more accessible. Last year, almost 2500 Kiwis were treated for cardiac arrests, but only 6%received defibrillation from a bystander before an ambulance arrived. St John's Simon Barnett told RNZ’s Morning Report programme today the technology is the same as a standard size defibrillator and delivered the same energy of 150 joules. The mini defibrillator - priced at $2990 - was designed for people on the go, Barnett said. While 72% of cardiac arrests happened at home, Barnett said the small defibrillator's mobility was one of its benefits.