EasyAcc 20000mAh 4 port Dual Charging USB Power Bank REVIEW

product link: http://www.amazon.com/EasyAcc-20000mAh-External-Portable-Smartphones/dp/B01422TC14 This big battery pack almost weight 1 lbs and packed a hefty 20k mAh capacity. Over 3 days of charging 3 phones about 2-3 time each, along with camera batteries, it still manage to have a 1 bar (25% or less) of capacity left. There're 4 output ports, each can handle 2.4A each. However, if all 4 port are used, they maximum output is only 4.8A and I do wish this was slightly stronger. What set this battery apart

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