(TrendHunter.com) The OISLE all-metal power bank is a durable, design-conscious mobile charging solution for technology users to add into their gear collection. The device features a 16,900mAh capacity, which can be... (TrendHunter.com) The OISLE all-metal power bank is a durable, design-conscious mobile charging solution for technology users to add into their gear collection. The device features a 16,900mAh capacity, which can be...