Solar-Power-Bank-Portable-Charger-42800mAh Solar Phone Charger with 4 USB Ports/LED Flashlight Fast Charge USB C External Backup Battery Pack Compatible with iPhone Tablet, for Outdoor, Camping

This power bank is tough, reliable, and perfect for outdoor use. It charges my phone fast, the flashlight is super handy, and the solar charging gives peace of mind when I’m off the grid. Great value for camping or emergencies!

Great emergency power during a week of no power after Milton!

These do work and are weather resistant, but the claimed battery capacity is not the actual. I own two of these and have cycled them several times. The best I got was 'about' 20,000 mAh. Don't get me wrong, 20,000 mAh is quite respectable for a device of this size and weight. The solar charger is, I believe, rated at 400 mAh in FULL sunlight. The charger might work in an emergency, just do not count on it too much, it would take 50 hours of full sun light to recharge this thing.Having said that, this device is useful as long as you know its limitations. It will take a charge at 12W with the right charger.My advice, compare it to other portable battery chargers 'correctly' listed as 20,000 mAh and then figure out which ones are best for the price.

Great product to have. It works where you are home or out snd about on the road somewhere bc it just needs the sun to charge it.

Though the product info claims "Fast Charging", it did not support any "Fast Charging", "Quick Charging" (QC) or "Power Delivery" (PD) protocol at all. It only provides a steady 2A-5V 10W output on any port!I tested it using a "Kowsi KWS-066C Digital " USB Power Multimeter and a 100W rated USB-C PD cable to recharge various devices like QC cellphones and PD Chromebooks.I returned it because I couldn't use it for even single port fast charging of a cellphone.Details:The ports could only consistently provide 2A-5V 10W output! Even when only one port is being used, after the first second of 3A-5V 15W output the ports switch to the lower 2A-5V 10W output. The total for all 3 simultaneously charging ports is 30W but no single port consistently gives more than 10W.Though it did eventually recharge the QC phone, it took 3x longer than a functional "Fast Charge" should have taken and I didn't want to carry around both of these devices connected together for that much time. And of course this means it could not recharge a Chromebook which requires at least 15W minimum to recharge while it is powered off.The Solar Charging is almost a gimmick. Leaving the power pack exposed to bright sunlight recharging for long periods of time makes the unit so hot from the sun that it's internal batteries overheat and throttle down the already small solar input wattage. If you are camping off-the-grid, you are better off using separate portable solar panels to recharge it.Since I was returning it anyway, I didn't bother to verify its 143.56Wh capacity with the USB Power Multimeter (the industry standard conversion formula for this power pack is "143.56Wh = 38,800mAh x 3.7V"). It would have taken too many hours at the low maximum output wattage of only 10W to measure the total Watt-Hours required to completely drain and then recharge the power pack.Note: This power pack would not be allowed as passenger airplane carry-on luggage (no power packs are allowed at all as checked luggage). The FAA regulations only allow carry-on lithium power packs with a capacity of 100Wh or less, the equivalent to a labeling of 27,027mAh or less.

Works perfect, placed in window of car to charge device, then connected to phone to to bring battery back to 100%.

Used it for about a week and lost it while hiking so i cant give any long term review but here is what i got from it.Went on a 5 day hiking trip with this (lost ot in the 4th day) thinking it would have enough juice to last the whole trip. Charged my phone twice, my headlamp once and my smartwatch once before it died on the 3rd day. Feels extremely light compared to other 40k mAh power banks ive held before so i doubt thats the real size of the battery.The solar panel is more of a gimick since it never made any real diference even thou the device was under direct sunlight all day long.

It works well, just remember to leave it out in enough light to stay charged so when you need it, it's ready to go.