Solar waver powered by homemade rechargeable

This video is for Granddad. He has successfully replicated one of my homemade batteries that I built back in 2012. OUbrads also replicate this rechargeable in 2013 and he did it using a small pill bottle like I show in this video. My original cell is still working after 8 years.
Here is OUbrads replication from 2013:

Here is Grandad’s video on this homemade rechargeable:

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