Xiaomi launched the Redmi 3S and Redmi 3S Prime smartphone in India earlier this month starting from Rs. 6999. We already brought you the review of Redmi 3S Prime, here we have the battery life test results. It packs a 4000mAh (minimum) / 4100mAh (typical) battery, has a 5-inch HD display and is powered by an Octa-Core Qualcomm Snapdragon 430 processor.