Fuze Battery Non-Replacable?

Totally agree, it’s unfortunate that the trend nowadays is to make players that die in 1-2 years, forcing users to keep repurchasing expensive players when the original player worked perfectly, aside from a dead/weak battery. It seems like the e200 series is the one to get if you want to use your music player beyond 2 years (when the battery will last ~20 minutes), but I only worry that when the e200 is eventually discontinued, replacement batteries might no longer be available?