Jason 9827 is your keypad model not the alarm panel. You either have a 9800 9800+ both are virtually the same.
You will require a Yuasa 7amp sealed lead acid battery, will cost about £10 plus vat trade
J 07842 480037
j
June 2009
Searched google for you
Stand-by battery 12 volt, 7Ah rechargeable lead acid, Gel type - search for this in google you will find several suppliers - or try maplins electronics
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home alarm systems.