It always depends on the usage. Not only the speakers, have any electronic gadget mostly relied on the usage for its life. On average, a Bluetooth speaker can function well for 2 years without any defect. But, if there are any physical damages, we may not predict. These are all built-in speakers that require a lot of components that must not be disturbed. If the speaker accidentally falls certain times, it may have serious damage that may not allow the speaker to function the same way as before.