mcs-710

I have the above system installed for about 5 years. Last year the batteries run out for the siren and i got 2 x 20k mah batteries from the supplier below... http://www.ebay.co.uk/itm/Visonic-Powermax-Siren-Alarm-Battery-MCS-730-MCS-710-MCS-720-0-9912-K-/161911999072?var=&hash=item25b2b50a60 I...

Hi, Hoping for some help. I have a Visonic PowerMax Complete and now I need to replace the batteries in two Sirens MCS-710 and MCS-720. I have the installer code to the system but I am not sure in which order to replace the batteries. In the MCS-710 instruction it says that I login to the...