Myron has a hybrid vehicle with battery assist. Will it last? Leo says that early hybrids may not have been that sophisticated, but that he wouldn't worry too much about its battery life. They're designed for that. What's more important is how you keep your batteries within a set temperature range.
Are they safe if there's an accident? Leo says the battery was designed for impact and is why those hybrid cars are a little heavier. They absorb and deflect more impact energy. They also have crumple zones to absorb the impact. That makes modern cars far safer now than decades past.