The Lumsing LUM-008-001 is described by the manufacturer as a “harmonica” style power bank. It has a respectable 10400mAh capacity and two USB output ports rated at 1A and 2.1A. Bought for Rs. 8500 in 2019 from Amazon US Selling for Rs. 3000; for inquiry: 9801300975/Whatspp Specifications : * Capacity: 10400mAh * High quality 18650 Samsung cells * Input: Micro USB 5V 1.5A * Output: USB 5V (1A & 2.1A) * Size: 5.43x 2.32 x 0.82 inches * Weight: 238g