Thank you. This is my first time looking at a security panel and really appreciate your help.
If its just the battery I can easily change it and measure its power unit also.
I can take it into work and see what I can find if its just the charging resistor that is toasted or if the circuit board needs repairing . If not, ask one of the senior electronics technicians to have a look.
Either way I dont mind getting a new panel and found a G4 panel and battery online.