Well about 10 minutes ago the door bell went and my NP7-12 Yuasa 12v 7Ah Battery arrived.
My old battery was already out of the control panel from the other day. Out of reach above the kitchen cabinets bye the way.
So I turned the mains off for the whole house and the old battery kicked in powering the alarm system.
I pulled off the wire from the old battery and connected to the new battery. The outside bell went off just like Associated Alarm said it would. I then connected the negative (black) terminal and this set off the inside bell. I jumped down off the kitchen steps and went to my keypad and punched in my code. It silenced both bells. I went back to the main box, put the new battery back inside the control panel, put the lid back, fastened the 3 grub screws. I then switched the mains back on, and at the keypad punched my code in again to clear the screen. The code needs to be entered twice as the fist time arms the alarm and the second disarms.
My keypad now says open as normal. Job Done
All this took less then 10 minutes.
Thanks to the guys that supported my doings, and thanks to Associated Alarm for offering to supply me with the reset code had I needed it.
Battery cost me £23.18 including delivery from Hardwareexpress.co.uk.
total saving ---- £282.80-£23.18=£259.62 lovely jubley