Urgent Question - Battery disconnect?

[bdesigns]

Hi everyone!

Sorry for the urgent question.

Ill be going overseas for 6 weeks tomorrow, and wanted to find out if it is okay to disconnect my battery in my Ford Fiesta WT Zetec 2009.

Ive been looking online about this but getting a lot of mixed responses. Does the Fiesta have any important system programs that need constant power running through it?

Thanks!!

Kind regards,
Bryan