Solar Power Bank, YELOMIN 20000mAh Portable Outdoor Solar Charger, Camping Waterproof Backup Battery Pack with Dual USB 5V Outputs/LED Flashlights and Compass for Cellphones, Perfect for Hiking Travel

I likes this solar power bank its so useful. the Solar Power Bank proved to be a trustworthy travel companion. My electronics were always fully charged thanks to its big capacity, and the solar panel offered a hassle-free, environmentally friendly way to top off the battery. Even though solar charging does not happen quickly, it was adequate to keep basic functionality. I thought the design was sturdy and portable.

The product arrived on time and functions according to the listing description. The charge lasts quite a while, depending on the type of device that you are charging. The flashlight works well and also functions as a strobe & S.O.S. signal.It does take a few hours to charge up with the included charging wire and is described to take around three days to fully charge using only power from solar charging.The size is perfect for travel, and the weight is also low, therefore making a great addition to any camping or hiking trip.I like that the appearance is sleek and the power from the device is sufficient for my needs.The only negative that I have regarding this product is that it does not support "super fast charging" on my phone, only fast charging. Although, I'm sure it will charge my other devices in a timely manner.I look forward to using this product at the beach and seeing how well the solar charging function works.

I have several of these power packs of different makes and models. I bought this one Knowing damn good and well that little solar panel really doesn't work it will keep a maintenance charge on the unit but if you think it's going to charge the entire unit up automatically you're thinking about 9 days in good sun without any use.I knew this when I bought it. In my backpack there are two folding solar panel units that will easily charge this up in a few hours of sunlight. About as fast as you can do it with a decent wall charger.This being said I'm completely satisfied with this particular unit it will charge up my cell phone maybe four and a half five times on a full charge. It will charge up my Chromebook at least once almost all the way charged. And it has absolutely no keeping my little micro rechargeable flashlights charged and running my qrp radio on low power. That way I can save my actual transmission packs for actually transmitting.If you pair it is with a decent little 15 watt or better folding solar panel set you will have a decent little outfit for disasters camping Etc

Great power source and as a flashlight. Doesn't charge well on solar though. A whole day or two still won't do it. I'm always using it for something. Several years now and still working great.

Nice product when it worked for 2 months and then it stopped working. Biggest piece of junk I bought. Not worth it. Wouldn't buy it again

The Solar Power Bank proved to be a reliable companion on my recent trip. Its large capacity kept my devices charged throughout the journey, and the solar panel provided a sustainable way to top up the battery without issues. While the charging speed via solar is not rapid, it was sufficient for maintaining basic functionality. I found the design to be portable and rugged, making it ideal for outdoor adventures and not worrying about running out of battery power.

I recently received this product and decided to do some testing and measurements, sorry battery died in my scale so no weight although I will say it is lighter than my 10000 mAh battery pack. I took a tape measure to the unit itself, it measures just under 5 3/8" long x 3 1/16" wide x 7/8" thick at it's thickest part, the cover, these do not include the clip. I can give this five star as it is exactly what they say it is. I was actually surprised at how little light it took to start charging, I found within about 3 feet of a 40watt florescent bulb it would start charging, wanted to test this after opening the box in my truck and the solar immediately started charging even in the shade, can not say how efficient it was. That being said I can agree that this is not the primary charging method suggested, 1 day in the sun (direct and indirect) gave me less then about 25% of recharge, where with USB it will charge quicker, just doing the amp hour calculation and conversions show this. Overall build quality is solid, and I found that even without touching the power button the unit sensed when I plugged in my phone to charge. The dual multi function lights are great, good output and easy to use. Overall I am very satisfied with this product and look forward to a lot of use when camping in the future. I will say this unit is just as advertised and perfect for my needs.

So if I just rate this as an actual battery pack it works fine just like every other battery pack I have for the most part. I fully charged it at home before going on my camping trip and it was fine using it as a battery pack from that charge. Unfortunately, despite the fact that I was camping in an open field with full sunlight and leaving it out all day, it really never gained additional charge from the sun and was pretty much useless after the initial charge. As far as the flashlight goes, it came with no instructions whatsoever as to how to use the flashlight and frankly I never figured it out or cared enough to try any harder so that I can't speak to (or mine is broken?) It does seem a little extra sturdy and having the little carabiner clip on the side makes it convenient to attach while you're walking around or for hanging it someplace so you don't lose it in your tent when it gets dark . Overall decent battery pack but I wouldn't spend the extra money for the solar or the flashlight. I'd just get a regular battery pack next time.