How long do you have?
Well, that depends.
iFixitnotesthat the chemistry in modern consumer-grade lithium-ion batteries are usually good for at least 400 cycles.

Anything beyond that should be considered icing on the cake.
Interestingly enough, the scan revealed the use of apress connectorjoining the battery to the circuit board.
It’s an odd design decision considering the battery is not replaceable.
Why not simply solder it to the board?
Perhaps Samsung went this route to make assembly easier and faster.