power bankmAh ratingbattery capacity
Why a 20,000mAh Power Bank Never Actually Gives You 20,000mAh
A 20,000mAh power bank realistically delivers closer to 12,000-13,000mAh to your phone. The gap isn't false advertising, it's voltage-conversion math that the mAh rating was never measuring in the first place.
Sep 6, 2026·3 min read
