Leaderboard

The 12-volt battery doesn't do much when starting a hybrid - it doesn't have to crank a starter like in a conventional vehicle. When mine died (2018, 5 years old at the time) I happened to have a 12-volt sealed lead acid battery lying around from a computer UPS that failed, and even with minimal charge, that was enough to start the vehicle - at which point the high-voltage system supplied enough power to keep the 12-volt system up, so that I could drive to an auto parts store to get a replacement.