Solar Phone Charger for Cell Phone, ECEEN 10W Solar Cells Smart USB Output for Smart Mobile Phone Tablets Device Power Supply Waterproof Portable Travel Camping Outdoor Activities Gear Emergency Kit

Lightweight- it is smaller and compact, folding into itself nicely. Now i consider it lightweight but for someone counting ounces on hiking or mountain climbing, probly have to judge for yourself.Thickness (size): id say folded up its about half the size of the old “trapper keepers” (some may be too young to remember those) or half the width of a regular notebook but same height. Now unfolded it is a trifolded design so it gets a little wider but nothing that cant be managed. I use mine a lot on the dash of the suv for when im out riding my rzr rs1. I can keep things charged while gone. Simply unfold it and lay it across the dash, plug in the usb and device- done.Power output- i have used my inline usb multi meter on it when charging my then iphone 10 max and now my 12. Both phones have pulled the full 2.1 amps but could never get them to pull more than that even with a usb to usb-c adapter and a factory iphone usb-c charger cable. So to be fair, I am an electrician so I decided to solder on some leads to the end of the panels to bypass the usb output. I was able to test and see how close I could get to the advertised “20w”. I could pull 15 watts consistently but never the full 20. Now obviously I was not testing in a lab or anything fancy, but I did use a decent fluke multi meter. Not some cheapy. Could 20 be pulled from it, most likely. Me being in Indiana and maybe being off a degree or two on the sun angle (yes i looked up the appropriate angle for my zip code and used the iphone angle finder-geek) these are all things that play into the output.Cost and build-built fairly well with nice material on the outside. Not overly built but being retired from the service, it puts you in mind of the same material as the assault bags or backpacks just not as thick. As for cost, it comes in at a decent price point for the intended uses. I wasnt looking for a charge bank in this case. So some of my larger items to charge like my ipad or or kids tablets (kindle fire hd) etc. its hard to beat it. A charge pack will run dead before filling multiple tablets unless you spend some money. I also wanted something to work while away riding. Not to mention, (if some of you fear) that if id use a charge pack while out riding, the circuit doesnt cut off at low voltage and then the lithium battery catches fire. Then i come back to find my yukon in an ashy mess. So, eliminating one issue (charging is another potential, i know) and sticking to something that will continue to last and produce power after thousands of charge cycles for this price along with the other up sides, makes it a fairly decent purchase.Only real downsides i can find is that it would be nice to have an added usb-c to maybe pull more than 2.1amps like some newer phones will. And maybe add an option to some how sucker cup it to the windshield or a window in a house etc. this opens up soo many more uses. Then one can use it indoors to charge items and not have to leave it, along with the device, outside. Also dont have to find a way to prop it on the window ledge or if your not parked the correct way etc etc.Update May 20, 2023Still going strong. I have taken it out tons of times on trips and seems to just keep charging away. It has slipped some in output as solar panels will do anyway but not enough that it goes from wow to a brick. Still has most of it as I haven’t crunched the numbers. I actually use it to charge a diy portable power bank that I built that has 16 molicel 35A in it for a total of 56 amp hours. I charge the bank before I leave and then use the folding panels to keep adding back to it as I use the bank. So far I have not managed to run out of the bank. So in the end is it worth it, absolutely. It may not be made of the finest materials available to mankind but it will certainly do what is asked of it, take a beating over the years, and keep trucking.

Works great. We were out of electricity for 7 days. It kept my phone charged. Also used it backpacking. As long as sun was out it kept our phone charged and is very light.

Highly recommended but spend the extra twenty bucks and get the 20watt system - you'll thank me!First - NO solar panel will EVER produce the wattage it's advertised to produce!I use this particular set-up when hiking or camping with an overnight stay. I bought a 10k milliamp battery and these panels charge it during the day. I use the battery to charge my devices after the sun has gone down.When hiking and this is hanging from my pack (on my back), the angle of the panels to the sun is bad. If you know solar, you know that the panel's angle to the sun for your latitude makes quite a difference - and hanging from your back as you walk will NEVER produce power even close to what this is rated for! With that said, when I'm hiking and we take a break, I make sure to leave my pack out in the sun. Between that and walking with it vertical on my back - it'll give me about 5/8 full on my battery which is plenty to charge my Galaxy S24 (phone) and Samsung smartwatch.In a 'static' camping setup, you can get a good angle on the sun with it, and if left out in the sun all day, it'll charge my battery to 100%.

What a cool product - They have thought of it all at ECEEN!The Good:5w power generation, carabiners, and webbing to attach to a backpack - perfect for hiking or the beach!Love the zippered pouch area and included USB cord. Black fabric housing is smooth, seams are tight, zips up into a light package! Not terribly expensive, actually quite affordable for the amazing build quality received!Downfalls: Black fabric housing will get extremely hot in the California Sun. I choose to charge a 10,000mwh battery bank rather than leave my $800 phone baking in the sun. That way I can leave it for an extended duration, store some power and charge my device in cooler temps! Charging my iPhone 7 would take upwards of 3 hours...Great Job ECEEN!!

Output : max output that I measure: 4.60V x 1.70 A. Being generous, that is almost 8W. Extremely far from the advertised 20W. This is with only one device plugged, very bright sun of California (hot !), zero cloud, perfect conditions for a solar panel.Weight: This was a good surprise, weight is lower than advertised ! 15oz, this is pretty light for a panel of this size. I was going to leave 2 stars due to the low output, but bumping it to 3 stars with the low weightSize and construction. The size when folded is quite compact, this is perfect. Quality of the materials looks reasonably good.Conclusion: The output is about as misleading between Eceen 20W and AllPowers 21W. I am returning both, and keeping the Blavor "10W". The output advertised is misleading too, but "less misleading", I measured a max output of 6W. In other terms, with Blavor I am getting 60% of what they advertise, while with Eceen & AllPowers I am getting 40% of the advertised power !!