Batterie will not hold enough charge. Mountfield Brigs & Stratten 1438 MSD?

I've been having to charge the batterie to start my mower , successfully up to now, but i presume the batterie wont hold enough amps now to power the starter? The mower still wont start when i use the jump leads. The starter turns the engine over though with the added boost.
Details : Mountfield Brigs & Stratten 1438 MSD
Batterie Fiam F19-12
Measurements 7.25ins long
6.75ins high
3.50ins width
Sealed Batterie with flat Terminals.
Where can i get a compatable replacement batterie and what type should it be ? As nobody has heard of Fiam Batteries.
Thanks for your help in this way, John
John Kelsey, October 2005


done
Can get same type of battery at Lowes or homedepot or walmart for about 20 bucks

bg, November 2005
link Click here to see other fixes for Mountfield.