Lixada Solar Panel Charger USB Port Portable High Power Paper Shaped Monocrystalline Silicon 10W Solar Panel Charger for Cell Phone Camping Riding Climbing Travel Outdoor Activity

Hooked this thing up to a Nitecore 10K power bank that was a little over 25% discharged. Kept in full sun here in southern California for 2 days and wondered why it was still charging. If it was a 10W solar panel it should be putting out 2 amps at 5 volts, which would be more than enough to charge even a 50% discharged 10K power bank in 2 days of full sun. So, I reordered from my first order to get another one to compare. Second one arrived, different dimensions, connector on different side, and it came with 2 caribiners, which the first one did not have. What the heck??? Hooked both up, since the nitecore has 2 usb charge input/outputs. Verified that each panel was delivering power by checking each with the other disconnected. Day 3, things are still charging in full sun. A little research reveals that you can reasonably expect about 70 mW per square inch from a typical solar panel. Let's be charitable and say these panels can produce 100 mW per square inch. The first panel I got has some blank lines running through it and is slightly larger than the second panel, which has no lines. Measuring the cell areas: #1 measures 8.5 x 5 inches. #2 measures 8 x 5". Let's say they are both 8 x 5 since the bigger one loses some area with the lines. That's 40 square inches per panel. 100 mW/square inch x 40 square inches gives 4 Watts. So, being charitable these panels at best produce 4 watts. So it's frankly BS to call them 10 watt panels. Add in all the other inefficiencies of charging a power bank and then using the power bank to recharge a phone, for example, and you've got a really ineffective solution. Makes me really wonder about some of the reviews on here.

Read the other reviews and decided to give this a go. So far so good, on day one. At first I left my phone (Moto X) in the sun under the shade of the device and it charged really nicely, until the phone overheated and stopped charging. When I moved my phone into some real shade and left the Lixada panel in the full California mid-day sun, the phone charged from 50% to 100% in a bit more than an hour. This is replacing a larger 10W panel that died, before it broke it was performing about the same, so I'm happy with the rate of this device. It is tiny, compact, and seems well-enough made. Interested to see how it performs on an upcoming week long trip in a small sailboat. UPDATE: after three weeks, the Lixada is still working. Using it daily to charge my phone. Takes 3-4 hours to go from near empty to near full. Took it on a trip packed in a book, it didn't break. So far so good for this tiny inexpensive lightweight solar USB charger. UPDATE: now 4 months later, using this almost every day to charge my phone, still working Update: 3 years later... The market has changed... "Solar chargers" Batteries with solar panels are now a thing, and pretty cheap... But this Lixada keeps ticking. One corner bent and it still works

I recently purchased the Lixada Solar Panel Charger USB Port Portable High Power Paper Shaped Monocrystalline Silicone and I have to say, I am extremely impressed with the product. I was looking for a portable and efficient way to charge my devices while I'm out and about, and this solar charger exceeded my expectations. One of the main reasons I purchased this charger was for its portability. The paper-shaped design makes it easy to pack and transport, and it's lightweight and convenient to carry around. It's perfect for outdoor activities or travel and it's great for charging your devices when in remote locations. The charger also provides a good amount of power. I found that it charges my devices quickly, even when I'm using it in low light conditions. I was particularly impressed by how well it charged my phone, it was able to charge it from 0 to 100% in just a few hours. The charger also made of high-quality materials. The monocrystalline silicone is durable and resistant to wear and tear, and the USB port is sturdy and well-built. The only downside to this product is that it is a bit bulky, it takes up quite a bit of space in my bag. But it's a small price to pay for the convenience and efficiency that it provides. Overall, I am extremely satisfied with the Lixada Solar Panel Charger USB Port Portable High Power Paper Shaped Monocrystalline Silicone. It's a great investment for anyone who wants a convenient, efficient and durable solar charger to keep their devices powered on the go. It's not perfect, but it's a solid choice for anyone looking for a high-quality portable solar charger."

I'm an electrical engineer that worked in the solar industry. I tested the unit and it produced just enough voltage to make it look like it is charging a device, but no charging current is flowing, so your device will never charge. When I opened the unit to look at the regulator it became clear this is a true scam product. As you can see from the picture, most of the components that should be mounted to the circuit board are missing. A large resistor, marked 390, is soldered diagonally to make a connection so the the solar cell is connected directly to the USB output through the resistor. This means that the solar cell is just connected directly to the USB socket with about 44 ohms of series resistance. So while this circuit will output a voltage making it appear that it is a charger, as soon as you try and draw current the voltage will collapse (it is just dropped across the 44 ohms). I measured the solar cell on its own, it has an open circuit voltage of about 5.7V and a short circuit current of ~800mA - this looks pretty typical for this type of cell. Beyond that, even if it had a voltage regulator, this product cannot work as described - it is allegedly a 'High-Power' 10 Watt charger - however as you can see from the picture it is quite small. I measured the size of the silicon cells, there are 10 cells in the panel, each measures about 12.3 cm x 2 cm, for a total area of 10 x 12.3 x 2 = 246 cm2 (I'm being generous and ignoring the two cells with diagonal cut corners). Standard test conditions used to rate solar cell power are 1000 W/m2, or 0.1 W/cm2. The best silicon solar cell efficiency is about 25%, so you can calculate the absolute maximum power this panel can produce by 0.1W/cm2 x 246 cm2 x 25% = 6.15 W, which is considerably less than 10 W and is the absolute best possible case, not including the likely lower efficiency of the cell and the losses in the voltage regulator circuit. This is not a 10 W charger and in fact it's not physically possible for it to ever get close to 10 W. This product cannot work, it appears designed to fool the buyer - DO NOT BUY.

Attention AT hikers, if you want a panel to take with you on your hike, this is the one. First, the reason for the 3 out of 5 star rating. One simple reason, this is described as a 10 watt solar panel. It is not. The maximum I have recorded (out of multiple tests) was around 3.5 watts. This is a 5 watt panel, not a 10 watt panel, and that is being generous. That is the reason for the lower rating. If this company would change the description from 10 watt to 5 watt, I would give all 5 stars. As a 10 watt panel, it is 3 stars, but 5 star 5 watt panel. One last con is the usb port which others have covered. Supposedly it comes off easily when the panel gets hot because of the glue they use. I cannot vouch for this because as soon as I received it I put some superglue around the usb port, and no matter how hot the panel gets it's on there solidly. Now for all the pros, and there are many. First, this seems very well constructed. It is tough and very light. Second, the total weight for the panel, not including any charge cord, is an amazing 2 7/8 oz. Yep, under 3oz, and that's it and that's why I recommend for AT hikers. Ultralite. Even with me adding a little superglue around the usb port, it didn't affect the weight. Still 2 7/8 oz. Third, even though it only maxes out at 3.5 watts, that is plenty to keep your phone charged. By my estimation, 3.5 hours of full sun with this panel will completely charge my I phone. It can charge a 5000mah battery in 5.75 hours (enough to charge my phone 1.7 times) and a 10000mah battery in 11-12 hours. I recommend the battery. Don't charge your phone directly from the panel, because the charge fluctuates constantly and I wouldn't recommend that for a phone battery. Let a regular $10 5000mah battery take that beating and protect your phone battery. Fourth, the price. $20. Totally worth it for a 5 watt panel this well made. For hiking, I use this panel (82g, 2 7/8 oz), a 10,000mah battery (187g, 6 5/8oz), two braided 12" charge cords, one micro-usb and one apple for my iPhone (26g 7/8oz), and a wall plug adapter with usb port (36g, 1 1/4oz). Obviously the plug is for when I hit town and can charge my phone and battery up quickly. You will need the micro-usb cord to charge the battery from the panel, and also to charge most devices from the battery. I have an iPhone so I also need the apple charge cord. This makes a total of 331g, or 11.675oz. Not bad to keep your phone charged. I start out with a full charge, and the 10000mah battery holds 3 charges. With the panel I can be out for weeks and keep my phone going. If you want to go with the smaller 5000mah battery, that is 1.7 charges and knock of 3 oz from the total weight (8.675oz). If you have decent sun that would probably work too. I attach the panel to the back of my pack and put the battery in a pocket to protect it from the sun with the charge cord between them. To sum up, the only issues are the usb port (easily fixed) and listing this as a 10 watt panel when it can barely qualify as a 5 watt. Other than that, affordable, well constructed, tough and ultralite. I highly recommend this panel, especially for hikers watching their pack weight. My only recommendations are, use better glue on the usb port, and change description from 10 watt to 5 watt.

The panel is very lightweight. Charging power is of course less than stated, but usable enough. I took this panel on a 50 mi hike and used it to charge a power bank that I used to charge other devices at night. I doubt it charged my power bank more than 30% of capacity during the trip, but the weight of the solar panel was less than carrying a 30% larger battery and it was nice to know that if there was an emergency I could use the panel to charge up even more by leaving directly in the sun rather than hanging on my pack. If I could change anything I would ask for slightly more rigidity to the panel and a higher quality more durable mount of the charge controller. This will break easily if not babied.

Puts out zero. Completely dead. Panel is small, light and compact, but unless it produces power, it's dead-weight. The USB connector on the back is small and light too, but also very close to the back-surface. So close, it was tough to fit a connector. Had to find a thinner connector. Recommend manufacturer notch the substrate and edge-mount their USB. It may not seem like much, but those few saved mm make a difference. Further, mount that edge USB in a corner, recessed enough that the user can velcro strain-relief for his connector. That means adding a slot for his velcro. Assuming mine was simply a bad unit, which happens from time to time? Otherwise, this panel is amazingly small and lightweight.

My first one broke after three months use in the backcountry, but I'm still giving five stars because this panel rocks! I strapped it to the top of my pack, angled slightly away from me on a north bound thru hike. This panel and a 5000MaH battery kept my phone fully charged all through the desert and above treeline, I only needed to supplement power when the weather was bad, or when I dipped into forested areas. It's small enough that I just put a second panel and battery on top of my pack later in my hike, this gave me more than enough power most days, and I eventually got rid of my wall charger all together.

Perhaps mine wasn't made correctly, but it only produces 0.1 watts of power when in direct sunlight with no clouds. I have tried on many days, and I have never had more than 0.1 watts. I saw other reviews that said they got 2 watts, which would have been perfect for me, but I am not able to use the solar panel I was sent. I didn't return in time, so now I am stuck with it. I ordered a second one, and it too only produced about 0.1 watts.... I returned it. I am ordering at third, as this is the perfect product if it actually works! - wish me luck...

This works great attached to my backpack. It’s light as anything and charges my power bank back up to full every day. I have only had it in fine weather but has been fantastic so far. Would recommend

I purchased but not effective...try to with cell phone, Battery bank....but in 2-3 hrs ...not satisfied. Then try to return as per Amazon policy....but no one to pickup..So not solution

BEWARE This is solar panel is NOT capable of genersting 10 watts as advertised The solar panel does not produce 10 watts as its described (its nearer to 4-5 watts maximim generated on a bright sunny day). This solar panel will NOT charge a modern smart phone nor will it top up a battery powered CCTV. The advertising literature on the Amazon page misrepresents what it's actually capable of doing.

I think I've been through three of these. They've worked for about as many days before the socket fails.