I ran a search for what i want to know but couldn't find it sorry (posted a few thrads this week!)

I need to know when changing the fuel filter do you need to disconnect the battery? (Mine is located behind the rear wheel). I dont really want to disconnect it if i dont have to due to the radio being aftermarket and not having the code. However i dont want to get electrified either...

I think i have the method for changing it down now but any hints/tricks that may make my life easier = much appreciated.