Powerfly 4 Powertube 500 to 625

[LenM]

I apologize if this has been answered, but I can't seem to find a conclusive thread......but will the Powertube 625 fit in my '21 Powerfly 4? I want a spare battery and thought I might as well order the 625 for an extra $400.
Thanks

 

[Darren]

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