Huawei's Ascend Mate 2 is the smartphone you'll use without ever having to worry where you left your charger. That's because this 6.1-inch monster packs an enormous 4,050 mAh battery. According to Huawei, that's enough power to keep this device running for up to two days of heavy use. With so much extra juice, Huawei also equipped the Ascend Mate 2 with a reverse charging feature that lets you use the handset's battery pack to charge other devices. And with a 13-megapixel Sony BSI rear camera and 5-megapixel front shooter, this Huawei is perfect for photogs and selfie lovers, alike.