I beleive he needs to charge with the AC cord or else with this:
a Solio Universal Hybrid Charger -- this just uses direct sunlight and no AC whatsover. I don't have one and am not affiliated with them, but it seems like this is one way to avoid using AC or USB power. I'm considering buying one.
Regardless, tell your brother to pick up the correct AC cord.
Let it charge overnight and then see what happens.
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