This is particularly important to know when you have a portable battery with a power budget of 200 watts. Anker demonstrates how to cleverly present this information on a display. That said, the Prime has a problem we've often seen in other Anker products.https://www.notebookcheck.net/Anker-Prime-20-000-mAh-hands-on-review-Large-high-performance-power-bank-with-helpful-display.788432.0.html
"Then there is also a 27,650-watt variant"
You got two paragraphs in...
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