Try amazon smile to donate to a charity of your choice automatically at no cost to you!
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This is the one I got, but it won't work with a switch and probably not the pi either, but it works great for all my phones:

https://www.amazon.com/gp/product/B071X3NFS4/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1