this little battery takes about 24 hours to fully charge but for that reason it holds so much power and mine lasted for a 3 night camping trip. I charged my phone, speaker, and used it to run a white noise machine all 3 nights. This thing is great to have and worth the cost.I LOVE THIS PORTABLE CHARGER!! Tested it straight out of the box. It arrived with 58% charge and was able to charge my phone from dead to full battery four times and still has 27% charge available!! This is awesome on long flights, treks, hikes and camping. I’m so happy I bought this I’ve told everyone I know to get one. The affordability for what it does is amazing. Highly recommend!1 day in and i definitely think it’s a great battery. However, it is pretty weird how there are 3 out USBA ports and only 1 USBC. Considering not a single major tech company is currently producing USBA ports and exclusively going with USBC it definitely is not future proofpersonally I don’t know a lot about it but my boyfriend raves about it. it has a little screen to show you how much battery it has left. seems to work well for what it is.This is by far my favorite power bank. I have no less than 12 different power banks of varying brands and capacities that I use to power everything from cell phones to laptops to drum machines on the go and while camping. So yeah, I'm a little obsessed with rechargeable lithium power banks.This one beats them all on virtually every front. No other power bank of mine can charge/power 4 devices simultaneously for so long yet still fit in my pocket and be fully recharged from empty in just 6 hours with a USB-C cable.Its only disadvantages are no 120v AC output and no DC barrel output as well as the fact that it disables 2 of the ports if you are PD fast charging something at 18 watts through the USB-C port output. But you can still use one of the USB A ports while doing that and you can work around the plug limitations in many cases with special cords and converter cables. Either of those output plug types would surely make this slender power bank a lot bulkier and double or triple its price.It can output 5v, 9v and 12v over its USB-A and USB-C ports which makes it extremely versatile and able to power almost anything that doesn't have an amp draw over 1.5 amperes at 12v.What's most amazing about this power bank is how much you get for the price. I have power banks that literally cost three times as much yet have a smaller capacity, fewer ports, no LCD display, cannot charge devices as quickly and/or are bulkier. This thing has superior features to most other power banks double or triple the price while remaining about the size of a large cell phone and easily fits in a pocket.I also have power banks that are about the same physical size and price as this one but don't last nearly as long, don't have an LCD, don't charge other devices anywhere near as fast, have half the number of ports, lack a USB-C port and take 12 hours to fully recharge instead of 6.Some of those other power banks are about to be given away as gifts and replaced by multiples of this power bank which is easily twice as good as anything else in its price range.This little baby can even charge a MacBook Pro or Microsoft Surface via the USB-C port! The charge process is slow compared to the 60w or 100w wall charger but it still works fine for extending battery life by hours and can more than double your laptop usage time on a flight compared to just using your laptop's internal battery.What you get for around $25 is really pretty astounding.This is also the highest capacity power bank you can take on a plane (100 watt hours at 3.7v is the TSA limit without prior approval).Two of these will easily get even the most tech-obsessed person through any long international flight using things like iPads, small laptops, portable video game consoles or really anything that has a power draw of 1.5 amps at 12v or less, even if your devices internal batteries are not fully charged when you start the flight.You can recharge this power bank quickly, so if you have a long layover you can definitely get yourself another flight's worth of power by spending a couple of hours charging it and your device at an outlet in the airport.I can't recommend this power bank highly enough, particularly for travelers with lots of gadgets who frequently travel with other people. Get two for $50ish and charge or power 8 devices simultaneously! What could be better?Overall, it's a good power bank. Can charge my tablet and phones at the same time without problemsI use 60 W solar panels to charge this power bank. With direct sunlight exposure, it takes about 6 hrs to charge fully. At 100% charged power bank, I can get about 3x iPhone 11 charges, 1x iPad, 4x iWatch and 3x Bose headphones. Not bad for a $35 power bank. Definitely worth the price.Works very well and a good price