> All things considered, 4 years is pretty good! 4 years would be fine if you voluntarily upgrade because a newer model improves over what you have in an appr

> All things considered, 4 years is pretty good! 4 years would be fine if you voluntarily upgrade because a newer model improves over what you have in an appreciable way. 4 years isn't fine if the device meets your needs and the only reason you have to replace it is because of the battery wearing out.