The lithium batteries were typically rated for 10 years, and modern flash devices are also typically rated for 10 years. Or were you thinking of something else

The lithium batteries were typically rated for 10 years, and modern flash devices are also typically rated for 10 years. Or were you thinking of something else? It's a heck of a lot easier to replace a lithium battery (even under power) than it is to replace most flash devices.