Swollen batteries were a result of design/manufacturing defects. It was certainly a common issue 5-10 years ago but should hopefully be a thing of the past by now.
Modern batteries should never swell, but will still wear out over time. Smarter battery management should be able to extend their lifespan.
Modern batteries should never swell, but will still wear out over time. Smarter battery management should be able to extend their lifespan.