1. If you mean Sony's laptop batteries, that was a batch that people weren't happy with and Sony replaced. No-one was content for them to go boom
2) Anything dependent on battery tech has a short life because because tech isn't hot. Laptop's going back to their first battery powered beginnings needed the battery replaced after a short time because the longevity of NiCads was pants in that use, but there was no better alternative. Now we have lithiums, which are a step up but still not great. These devices are limited by technology. If a portable stops working because the battery dies, even using the best technology possible in batteries it'll happen, the owner is faced with either replacing the battery, normally at considerable cost - they aren't cheap, up moving on to the new, improved device. There's no similarity in consoles. There's no technology in them that is expected to fail in 18 months of use because engineers don't have available any better solution. If they put in a CPU that melts after 18 months, it's not because human technology is the limitation, but that they chose a cheap system. Quite different to battery tech, where there is no alternative to batteries with limited lifespans.
Which is exactly what I was saying earlier! People upgrade some devices like phones rapidly because after 2 years of ownership, a far better model is available. This isn't the case with large CE goods. A mobile phone maker knows no-one is going to keep their mobile for more than 2 years (not true, but let's stick to this generalization) so doesn't need to sweat long-term device longevity. If it dies in 2 years, or 18 months, the owner was going to chuck it away anyway so it doesn't matter, they don't care. You don't buy a brand new console every two years that surpasses your old console though. When you buy a console now, you don't do so thinking in 2 years you'll buy a different brand new console. There is not that expectation where there is with the mobiles. Thus the expected longevity, IMO, is for the machine to last until the owner moves on to the next new thing.