I leave my car over a month have not drive!! and the lead acid battery discharge to ~10V, So, I decided to use a Solar Battery Charger for maintain battery voltage if I leave my car again! And use Home Lead Acid charger for recharge the total discharge battery!
*Updated 08Mar2005*
The solar charger from Silicon Solar Inc.

Which can generate 21.8V in normal sunshine!

And, the Home Lead Acid Charger

My Panasonic 12V 65Ah Car Battery
Page 1: About my 3000GT
Page 2: ECU repair
Page 3: Front Active Aero dam repair
Page 4: Rear Active Aero spoiler repair
Page 5: Knock sensor replacement
Page 6: Some tools
Page 7: Other GTO
Page 8: My memory
Page 9: Diagnostic Datalogger
Page 10: Solar & Home battery charger (You here)
Page 11: Upgrade Cooling kits
Page 12: MFR Fignter Falcon Carbon 6 duct Hood
Page 13: Coast Fabrication, Inc. AeroCatch Body Panel Mount System
Page 14: Red grounding cable
Page 15: Air intake
Page 16: The 3SX Custom Engine dressup kits
Page 17: Deft Racing VLS
Page 18: Random Technology Ultra High Flow Catayltic