Z2 Pro : aging device and spare parts

[Chromatic]

Hi,

Proud owner of a Z2 Pro for about a year and a half, I must say my device is working pretty good (things related to Zui excluded). But it become quite a bit more difficult to find out accessories for this device, like protection sheets or casings. And I think it would become more and more difficult so, question: should I buy some useful spare parts like a battery in advance? I plan to keep this device at least for 1 or 2 years more (in fact I don't feel the need to change)
What do you guys think about this?

Regards

 

[nero355]

I don't know about battery but for cases and covers check eBay : There are like a billion options for buying one!

 

[Chromatic]

For the case, I am OK now (or should I look for another "wallet style" with reinforced corners?). But buying a spare battery without using it seem strange to me...