Jackery 300 vs 500 My gadget isn’t telling me what time it’s supposed to be working. Is there a correlation between actual usage statistics and the expected lifespan of particular devices? 518Wh*0.85 / the operating power of your gadget is the working time. Despite the fact that we use scientific data to determine how long our equipment will last, it is probable that each person’s experience with the equipment may vary. How long does it take to completely charge this energy storage device? A: Additionally, you have two backup recharge options: you can use the car’s charging port, which takes around 16 hours, or you can use the Jackery Saga 100W solar panel, which takes about 9.5 hours (Sold Separately). What is the best way to find out when my device is available? Is there a correlation between actual usage statistics and the expected lifespan of particular devices? If your device’s operational power is 293Wh, your working time is 293Wh*0.85. Individuals may use our equipment for longer or shorter periods of time than we estimate based on laboratory results.