UMIDIGI looks ready to surprise the smartphone market with the upcoming UMIDIGI A100 . Leaks suggest that this phone could bring some significant upgrades — a large battery, fast charging, and even a rear display for added convenience. UMIDIGI A100 Comes With a Huge Battery and Fast ChargingThe UMIDIGI A100 is rumored to come with a huge 6600mAh battery, which is bigger than most phones in this range. The leak also suggests the UMIDIGI A100 will have IP64 water and dust protection and military-grade drop resistance (MIL-STD-810H), meaning it can handle rough daily use. The huge battery alone will get attention, since it promises long hours of use without constant charging.