Long-Lasting LiFePO4 BatteriesWith our proprietary long-lasting technology InfiniPowerâ„¢ combined with LiFePO4 batteries ultra-durable electronic components a smart temperature control system that monitors temperature up to 100 times per second and an impact-resistant structural design Anker 760 expansion battery is built to last over a decade even with everyday use.Double the PowerUse the 2048Wh 760 expansion battery with Anker PowerHouse 767 (2048Wh) and scale up the battery capacity to 4096Wh.Extremely Durable and SafeDrop-proof unibody design electronic components with a 50000-hour lifespan and a ventilation grille for better heat dissipation show that the 760 Expansion Battery is designed for the long run. A secure 3-point protective clasp safeguards the battery and ensures no leakage current occurs while charging.