... batteries, long lifespan, and more safety.9, Auto power off, make better use of battery energy.10, Prevent wear ... design,more anti-resistant and durable.[Power bank/ mobile power ] Parameters: BrandLIKMEModelLM-1009Cell Type18650 coreCapacity2800mAh Recharging time2 ... %Circle life500-800 timesOperating Temperature-20°C-50°CStorage Temperature-20°C-50°COver Current Protection√Short Circuit ...