I built up a bit of a stash before they discontinued them for good. Hopefully the (sealed and unused) batteries don't degrade too much while in storage so I can

I built up a bit of a stash before they discontinued them for good. Hopefully the (sealed and unused) batteries don't degrade too much while in storage so I can have enough spares to last me until software support is discontinued. It's like the modern equivalent of a wine reserve.