Bests & Worsts Reviews from Amazon

UPDATE 8/4/19: I asked Jackery if they sell a replacement car charger. Jackery said they would ship one to me for free if I posted a review. Since I was going to post one anyway, I posted my honest 4-star review below. Jackery then contacted me and asked me to change my review to five stars. I'm disgusted with this customer service, and would no longer recommend Jackery. ORIGINAL REVIEW: Although I see a lot of people mention that they use this with their CPAP, I don't see many specifics mentioned. So for the sake of anyone else considering this for use with their CPAP, here's my review listing my exact model, settings, and typical runtimes. First, keep in mind that any AC inverter is going to waste a LOT of energy, no matter what brand we're talking about. To get the maximum possible runtime for your CPAP, use a 12-volt car adapter made specifically for your CPAP device. The 12V socket is why I bought this model. Second, if you're like me, you did the math and calculated that if your CPAP's power supply is rated for 80 watts, and the Jackery provides 240 watt-hours of energy, then you only get three hours of runtime from this model. This is INCORRECT. Your CPAP may not continuously draw the full rating of its power supply. While in use with the humidifier, mine fluctuates between 5 and 70 watts. So don't rule out this model just because it's only rated for 240 Wh. For my tests, I use my Philips Dreamstation with the attached humidifier. It runs in APAP mode with a pressure range of 10-14 cm. Most of the time, it's around 11.5-12 cm. FLEX is set to 3 and humidification is set to adaptive level 4. I do not use a heated hose, I did not use the preheat function, and I did not use the ramp function. My 30-day AHI is always below 1. I fully charge the Jackery before each use. Test #1: After a full night's sleep (typically 7-8 hours of CPAP runtime), the Jackery shows anywhere from 25% - 40% remaining. I attribute the variance in runtime to the adaptive humidification and changing environmental factors. Test #2: While sleeping outdoors on a humid night with lows in the upper 60s, the Jackery had 75% remaining after about 7 hours of CPAP use. Based on how much water was left in the reservoir, I believe the CPAP humidifier did not kick in at all. Test #3: A full night's sleep, but with the humidifier disconnected entirely, gave results similar to test #2. In other words, this gives me plenty of juice to go camping for a few nights without the humidifier (or one night with the humidifier). Your results will vary based on your CPAP model and settings. And again, you will lose a significant amount of runtime if you use your CPAP's AC adapter instead of a 12V adapter. This isn't a problem with Jackery; it's inherent in the way inverters work, and it's something to be aware of no matter who you buy from. I'm docking one star because of the unit's low-load shutoff feature. If you draw less than 10 watts for a certain amount of time, the Jackery will automatically shut off. This behavior is not consistent; I've had it stay on for 30+ minutes with nothing connected. There should be a way to completely disable this feature. If you can overlook that one minor annoyance, this is an excellent battery pack. Aside from the CPAP specifics, build quality is excellent. It feels sturdy in your hands and takes up a lot less space than I was expecting. A full recharge takes about 6 hours, as expected for a battery of this capacity.