- 3x Faster Dual Output: Both standard USB and USB Type-C ports support 15W (5V/3A) output to compatible devices, which means A3TC external battery provide up to 3x faster charging speed than standard 1A outputs. Reversible USB-C Connector: USB C port acts as an input and output intelligently. Recharging A3TC power bank only takes 4 hours with QC 2.0/3.0 or PD adapter and it is compatible with almost all smartphones, tablets and other USB charged devices. 10000 mAh Capacity: This little thing can easily extend your device usage about 3 times. Fully charges your iPhone 8 3.6 times, iPhone X 2.4 times, Nintendo Switch 1.5 times, Galaxy S9 Plus 2.4 times. Elegant Design in Gleaming Red: A3TC red has a unique dazzling red color and comes with the continuation of Zendure's ultra-durable design. It is one of the most compact and lightweight external battery packs on the market for its capacity. Why Zendure: Originated from one of the most successful external battery projects on Kickstarter. Designed around YOU. Trusted by more than 100k fans worldwide. Join the Zendure family today.