They're still being sold with lead-acid batteries because they're cheap, and they're good enough for those applications. LiIon batteries are significantly more

They're still being sold with lead-acid batteries because they're cheap, and they're good enough for those applications. LiIon batteries are significantly more expensive, but if the application requires that performance (like EVs), then that's what you use. No one cares about having a golf cart with a 100-mile range.