The smaller 5200mAh power bank is compact and can fit in your jean pocket easily since it is just 5.5 cm wide. It weighs 155 grams, about 95 grams. Mi 5200mAh Power bank have anodized aluminum shell that gives them a premium look and a solid build quality that you don’t expect in power banks in this price range. These have curved corners and have Mi branding on the front. The charging/discharging chips are designed by Texas Instruments. These feel solid in hand and doesn’t get scratched, even though it has smooth aluminium finish on the outside. Since it is in silver color, dust and stains are clearly visible. But these are water and corrosion resistant.