EnginStar Portable Power Station 300W 296Wh Battery Bank with 110V Pure Sine Wave AC Outlet for Outdoors Camping Hunting and Emergency, 80000mAh Backup Battery Power Supply for CPAP

This EnginStar 300W power station has become my reliable companion for camping trips and emergency backup power. At 6.5 pounds and compact dimensions, it strikes an excellent balance between portability and capability that makes it genuinely useful for outdoor adventures.The pure sine wave AC outlets provide clean power that safely runs sensitive electronics like laptops and cameras without the compatibility issues found in modified sine wave units. I've successfully powered my laptop for several hours, charged multiple devices simultaneously, and run a small LED light setup without any performance issues or device problems.Battery capacity at 296 watt-hours proves adequate for weekend camping scenarios. Realistic runtime includes charging phones 15-20 times, running a laptop for 4-6 hours, or powering LED lights for multiple evenings. The LCD display clearly shows remaining capacity and power draw, helping with energy management in the field.The multiple charging options add real versatility. Wall charging takes about 7 hours as advertised, car charging works well during travel, and solar compatibility (panel sold separately) provides off-grid recharging capability. Having all three options covered means you're rarely stranded without power options.Build quality feels solid for the price range. The housing withstands typical camping abuse, and the various ports and switches operate smoothly. The integrated LED light serves as a useful emergency illumination source, though it's not particularly bright.The protection systems appear to function properly - the unit has safely handled various load scenarios without overheating or shutdowns. Battery management seems effective, maintaining consistent performance through numerous charge cycles.Limitations include the 300W power ceiling, which rules out higher-draw appliances like microwaves or space heaters. The cooling fan can be audible during heavy loads, and charging time is relatively long compared to some competitors.The maintenance requirements are clearly explained and reasonable - periodic charging prevents deep discharge damage, and proper storage guidelines help preserve battery longevity.Bottom Line: Excellent portable power solution for camping, emergency backup, and mobile electronics needs. The combination of capacity, portability, and multiple charging options makes it valuable for outdoor enthusiasts and emergency preparedness.Best for: Weekend camping, RV trips, emergency backup power, outdoor photography, remote work setups

Had this power bank a year now. Used it once last camping season and again last weekend for the second time. In between seasons it remained stored with about half charge, in cool and dry location. I am happy to see it not only still functions but does so well. After fully charging (a few hrs) I was able to use it for two nights to run my cpap and to top off the inflatable mattress in the tent, in addition to charging phones and Apple Watches a couple of times. I then recharged it again at the campgrounds and used one more night for the actions already described, and it has half power remaining. I was always a hardcore camper, not relying on anything electrical or electronic during my outings, and at this point in my life comfort matters and especially considering the cpap. This power bank has been money very well spent and I hope it last a few more seasons.

UPDATE**** I gave the Enginstar 300 another try. The first one proved to be faulty. The second one works as expected. It powered on with no problems. I've used it to charge cell phones, tablets, a small fan and a CPAP machine. It's perfect and great to have on hand if there's a power outage. I am very pleased with this one***** I ordered one. Delivery was great. However, after a full charge, it would not power on. The only way it could be used was if plugged into the wall to jump start it! This defeats the whole purpose for having it. After reading recent reviews, I see there is no need to replace it with the same kind. It was returned the next day.

Fantastic powerbank worked great while out boondocking in camper I used for fans and cpap machine it charged up fast and held a good charge. Its quite built well nice screen for information and the price point 👉 was exceptional 👌 👏 I bought two. Very satisfied 😌 ☺️

Barely ever leave reviews on here, but I only have gotten 2 uses out of the battery. Now it wont turn on unless plugged in with the provided power supply (even though it shows fully charged when plugged in!). Apart from that, it seems like it was well made, but $150 for 2 uses lasting less than a collective 8 hours is pretty bad.EDIT:They replaced the battery for free, and so far the second battery is working as intended. I will update if that changes. I'm very happy with the customer service!

Great product! Fast charging love how portable it is. Used it for 2 night charging phones blowing up bed and floats, and only used 10% of the charge .

I took this little power station on a month long camping trip to Montana recently. I was very pleased with its performance and surprised by its functionality! I found the added rear flashlight very helpful in the dark area of the camper it was living in. I was able to plug it into my larger solar generator to charge, but it functioned great on pass through power also. I used it to run my ceiling fan, lights, water pump, and charge my small devices such as the phone. I would recommend it for light duty jobs as I’ve used it for.