You can buy new battery from screwfix,maplins,B&Q,or from most electrical outlets,or you can order from internet.
You will find the battery details on the one already installed,so just replace it like for like.
Pop in paragon super into the search bar at the top of the page and you will see a post covering a battery replacement for your's.
Remember to isolate mains power to the panel before you remove the lid as mains voltages are present.
Good luck but most of all be safe :)
e manno, May 2013
