Mini Portable Charger Power Bank 5000mAh Capacity External Battery Pack Dual Output Port and USB-C (Input Only) Power Bank for iPhone, Samsung Galaxy, Android Phone, iPad & etc (Blue) - Walmart.com
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Sky Power Bank, Capacity: 10000-20000 mAH at Rs 450 in Rajkot | ID: 20320594012
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Amazon.com: Anker PowerCore 20,100mAh Portable Charger Ultra High Capacity Power Bank with 4.8A Output and PowerIQ Technology, External Battery Pack for iPhone, iPad & Samsung Galaxy & More (Black) : Cell Phones
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![Example of power bank with two different capacity ratings [21]. | Download Scientific Diagram](https://www.researchgate.net/publication/338985271/figure/fig4/AS:854106335879174@1580646227236/Example-of-power-bank-with-two-different-capacity-ratings-21.jpg "Example of power bank with two different capacity ratings [21]. | Download Scientific Diagram")