Replacing battery of Husqvarna Automower 430x

Just bought exactly the same aftermarket battery, after installing displays says battery problem . This new battery was almost empty installed and 5 minutes charging the display mentioned 100% charged !! so my 430 x (2018) started mowing (this was driving along the lawn without mowing actually) and 5 minutes later he went back to his station displayed a stil 97% full battery ( but actually almost empty). YEs one can enter the "secret" 7 9 service but do you have to change something here?? My electrician says there is small software installed in the battery witch give the right (original bat.) or wrong ( non original aftermarket bat.) information. Makes sense since they want to protect their incomes. Do or did You have the same problems or did I forgot something. Because my findings so far is buy a original battery.