If the world does collapse access to wikipedia could be enormously useful.
What makes you think you'll have electricity in a TEOTWAWKI scenario? I'll still take beans & ammo (and maybe a paper survivalist book).
On a more general level, if you desire to prepare for the civilization collapse, downloading Wikipedia to your local hard drive is probably not the right place to start.
I have a generators and a printer to print any pages I need. It might be worth looking into a low power device that could read text and require minimal batteries or maybe a solar panel.
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