I am very pleased with this Jackery Portable Power Station Explorer 240.Since getting my CPAP three years ago I've had only twice where the power was out at a time where it affected my ability to sleep. Yet both times it was stressful and kept me from sleeping - I need the CPAP to safely sleep at all. The second time was several hours, power going out overnight. The other time we ended up checking me into a hotel. This would be expensive if we didn't do something. We looked at the range of options for CPAPs from well known companies, and they too were very expensive. So we decided to look at Amazon for a backup battery option and found this Jackery Portable Power Station Explorer 240.In reading the many reviews and comparing to others here on Amazon, this is the one we felt would fit our lifestyle and home best. We did consider a larger size from Jackery and still may in the future, but for our current needs, enough others said this worked for their CPAP we decided to give it a go and we are happy we did. Of course our timing was ever so slightly off - a major storm rolled through two nights before it arrived - but luckily we didn't need it. Without the weather, we still gave it a try to make sure it works. My wife charged it that day - make sure you read the instructions for understanding how best to use and keep the battery in top shape. That night I slept with the Jackery Portable Power Station Explorer 240 rather than normal power to test it. It worked perfectly. We did note in many of the reviews folks suggesting turning the humidity down. Some had turned it off entirely, others kept it at a 2 level, so we went with the 2. I knew turning it off completely would not be comfortable for me, and even at 2 it took awhile for my nose to adjust. But in the end, it worked perfectly. I had it on being used for just shy of 9 hours. There was enough we felt I'd be able to get a second night out of the original charge. In the past we have never lost power here for more than around 8 hours, so a second night wasn't a concern. However, knowing it is possible, we also know we'd potentially have to take it somewhere to charge after two nights. This is why we would consider a larger size in future. There was at least one we noted specifically stated "for CPAP," whereas this Jackery Portable Power Station Explorer 240 technically does not (at the time of purchase).The Jackery Portable Power Station Explorer 240 unit is a great weight. It's substantial enough to sit on a table and not worry about it getting knocked or blown over (if camping), but also really easy to move around. While children and some seniors might have an issue, most should not. I think we were most blown away by how quiet it runs. We use a sound machine to help us sleep - and anyone who uses a CPAP knows it makes a sound that can be uneven as you sleep. This Jackery Portable Power Station Explorer 240 was no where near as loud, and the "sound" we did experience blended well into the other, louder ones. It is very easy to use and very easy to charge. I cannot remember the exact time it took that first charge, but it was only a couple to a few hours - not at all bad. We have only used it once so far, but I've told my wife I want to use it from time to time in order to make sure it keeps running, we know it's charged, and that it's still working. But if it does those things, it'll be considered an excellent find and should keep me safe and prepared for the foreseeable future. I'm very pleased.