Microsoft Launches ‘Portable Dual Charger’ Power Banks in 3 Capacities After Xiaomi, OnePlus, and Asus, Microsoft on Wednesday launched a set of three power banks with 5200mAh, 9000mAh, and 12000mAh battery capacities in the accessory market. The Microsoft Portable Dual Chargers will June 13, 2015 Business/Channel/IT Magazine/Magazine Advertisement india/New Feature/News/price and specification/price cut/Product Launch/Social Media/Tablet/Technology News/Telecom News