The new Mi Power Bank 2S (10000mAh) is light, convenient and portable. The dual USB outports support multiple charging protocols, making it a partner in your travels that won't let you down. Dual USB outports - 2-direction charging - Lithium polymer battery. The power bank is equipped with two USB outports. The ports not only use more precise circuit controls, they also ensure that two smart devices can be sufficiently charged at once. The Mi Power Bank 2S (10000mAh) can charge at up to 18W (12V, 1.5A/9V, 2.0A), cutting back significantly on charging time.