BoomerFZ1

I lost the battery in the key for my '93 LS400 and I can't for the life of me figure out what to replace it with. Does anyone know a stock number or part number for the battery that goes in this key?

Am I right on the 4" on the speakers? And the free air sub....what size?

I'm planning on getting all new speakers for the doors and possibly replacing the mids in the upper doors of my '93 LS. That's not too much a problem but I just wanted to verify they're 4" speakers, right? I also wanna replace the sub but someone told me its some kind of funky sub they don't make many of anymore...something about self-contained or something??? Not totally sure but can you all hip me on this...what type/size sub will I have to get to replace it? I like the sound of the stock system when everything's working right but I've recently blown two door speakers and it kinda sounds like !Removed!.

I wanna get some new speakers and a new subwoofer for my car but I can't find out the speaker sizes on Crutchfield.com or any other website. I have two front, two back, two mids by the sideview mirrors and a sub. Anyone know the sizes?