Jackery 240 vs 300 THE JACKERY 300 WAS DESIGNED FOR PRIMARY INDOOR USE. NOT TO SAY THAT IT CANNOT BE USED WHILE CAMPING OUTDOORS. IN THE EVENT OF AN EMERGENCY, I KEEP MINE ON MY NIGHTSTAND AS A BACKUP FOR MY C-PAP MACHINE.
I'm not sure where Jackery gets the notion that it will "destroy the battery life." Pass through charging is a type of charging that allows electricity to flow to a device while keeping the battery in good condition. As a result, when the battery is fully charged, the extra power is directed to the device, which could be in standby or active mode. It will send power to a plugged-in device without using the battery. It's exactly the same as it was before the charge. A portion of the power used to charge the battery is diverted to the device that requires power while charging. It will take longer to charge, but it will give the plugged-in device the extra power it requires without draining the battery. Pass through charging is now available on a wide range of devices around the world, including phones, laptops, tablets, and other electronic devices. When using or charging a device, it's even better to leave it plugged in. It has no effect on the internal battery, and the box keeps it trickle-charging so it's always charged, unless there's a power outage and you need the full charge.
It is determined by your air pressure and settings. The unit has an auto-off mechanism that applies to all output ports, including the DC one, which should be used with a CPAP. This is a major concern if you're attempting to extend the battery life. I purchased this to use with my Resmed Airsense 10 with DC converter, and it lasted approximately 5.5 hours at a 7 watt draw before shutting down (My unit is set to Auto and my pressure avg 8.7). The explorer 240 began the night with 100 percent capacity and is now only at 84 percent, indicating that it performed admirably until the auto off option was activated. I figured that at my usage rate, it would last 3 to 4 nights of camping before needing to be recharged. Although this appears to be an excellent product, the auto off option should be removed in order to reduce energy consumption. Although the 6-hour auto-off feature is not explicitly stated in the specifications for all output ports, it does apply. To reduce power draw while using a CPAP, the website recommends turning off functionality. I was able to extend the charge's life, but no one wants to wake up to a 6 hour built-in alarm, unable to breathe because the battery had died. You can increase the power to more than 10 watts by adding more things, but this limits the amount of time it will run, or you can simply accept that you may have to turn it back on after 6 hours.
While the last answer is correct, I'd like to add something. I'm no expert on portable refrigerators, but I do own two and have tried to figure this out. The fridge will run continuously until it reaches the preset temperature, at which point it will cycle the compressor on and off to keep the temperature stable. The temperature outside has a significant impact on how long the battery lasts. I discovered that between 85 and 90 degrees, I can get 20 hours, but after that, it drops dramatically, and, by the way, all power plants have a "working temperature" that you must be aware of. For example, when I go camping in the summer, these power stations are generally useless because the peak temperatures in my area are 100 degrees or higher, which is too hot for lithium batteries. I can't say much more than that the battery life varies greatly depending on the ambient temperature because I don't run a consumer lab. Both of my refrigerators have eco mode, which means the compressor runs at a lower speed to save energy, but it's a fine line to walk. If the fridge is unable to maintain the desired temperature, it will run longer and consume more energy. If the ambient temperature is too high and the fridge is unable to keep up, you may end up using more energy in eco mode than in non-eco mode. Furthermore, with a non-regulated DC output, the lower the voltage, the fewer watts the power station will provide, requiring the fridge to work harder to maintain the desired temperature. Although the description does not state it, users claim that it is a controlled 12V output. I can't say because I haven't decided whether or not to buy. Normally, you can tell because these refrigerators display the input voltage; if it's a constant 12 or close to it, it's regulated. So, if you run the fridge in an RV with AC and keep the temperature below 90 degrees Fahrenheit, and you also precool the fridge from a wall outlet, just about any power station of this size should provide you with 20 hours of run time, possibly 24 hours, depending on the ambient temperature. However, if you're going camping in an area where the temperatures will exceed 90 degrees, you'll need an ice-filled cooler. By purchasing a home freezer, filling it with ice, and purchasing a high-insulated cooler, you can save money and time. Alternatively, you could purchase a solar panel. They can operate at higher temperatures, but you'll need a powerful voltage regulator and, of course, access to the sun, which isn't always guaranteed.