Aukey® External Battery Portable Backup Battery 10000mAh Qualcomm Quick Charge 2.0 for Samsung Galaxy S6 / S6 Edge Note 4 / Sony Xperia Tablet Z4 / Turbo Motorola Droid / HTC One M9 / Google Nexus 6, etc., Silver (Electronics)
Small battery, but heavy, which can quickly charge a phone, many times, with 10000mAh. Functional with smartphones without technology Quick Charge 2.0 (the iPhone does not have). Takes up little space for travel.