flat battary

[ferno1]

Hi all, my F430 battery is about 3 years old, (Bosh 5 yr warrantee) I have it on official Ferrari (ctek) trickle charger in garage but got side tracked a few weeks ago and didn't switch it on at the socket silly I know, now noticed that battery is totally flat even switching charge back on don't think its going to charge it back from flat.

is it advisable to jump start from another car, or even a spare battery? or buy a heavy duty battery charger?
any suggestions.

[ferno1]

Cheers all, I just buy new battery simplest solution.