This Xiaomi powerbank has 10,000mAh capacity and conversion rate of 93%. But why does it indicate actual output capacity of 6,900mAh instead of 9,300? - Quora
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Amazon.com: LANMU Battery Pack Power Bank Compatible with Oculus/Meta Quest 2,Quest, Quest Pro, and PICO 4 VR Headset, 5V 2A 3350mAh Lightweight Extra Battery Accessories for 1.5 Hours Playtime : Video Games
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Amazon.com: iWALK 9000mAh Power Bank Portable Charger, Gaming Charger with Built in Cable 4.9ft Length, Compact External Battery Compatible with iPhone 11, XS/XR/X, 8, 7, 6 : Cell Phones & Accessories
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