Quickly Oxidized Solar Cells
937192
After only seven months, I had to take down this light and sand the oxidation off the solar cells because the light was not working at night because it was not able to charge the batteries. I replaced the batteries with 2800mah nimh batteries while I had it off the pole. I really wasn't planning on having to perform maintenance so soon.

All that aside, The product is easy to use, easy to install and requires no wiring.

Deneve, please use better plastic to cover the solar cells for longer life. I really don't want to leave my beloved banner in the dark again.
2405694
When the LuckLED Outdoor Solar Sensor LED Light arrived, the LED light and solar charging panel was covered in protective plastic.  After peeling that off, I pushed the included small key pin into the on/off hole to turn the light on.  It is partially charged so I set it under a bright light to fully charge it. The lights have an on/off switch on the front inside of a small hole.
Powered by batteries, the lights charge via the solar panel on the top of the units during daylight. The light panel has 6 bright LED lights that glow a soft light when there is no motion detected but come on much brighter once motion is detected within about 10 feet of the unit. T

The device is lightweight and can be easily mounted using the small hole at the top of the unit with a nail and / or using the screw hole at the back to attach the device. It is waterproof and heatproof.  After fully charged by the sun, itll give you 12+ hours of bright light when motion detected and soft dimmed light when not.

**This was purchased at a discount in exchange for my honest and unbiased review of this product.
317865
I use these two to power up my Chromo Inc 160 LED CI-160 dimmable LED lights. They are easily inserted and easily removed from the device. I find this method of powering up these LEDs very convenient. Can't say they last for too long, maybe close to an hour on maximum brightness. I'd say long enough. But the main weakness is the slow charging speed. It takes around 3 hours, maybe more, to fully charge with the provided charger. So you can't really count on charing one of the accumulators, while using the other. You need to make sure you have enough accumulators for the evening.
4453053
To test this solar panel I've been using the 5w panel to charge charging an external battery pack from which I am charging my cellphone.

The solar cell sits in a south facing window all day charging the battery pack and I charge my phone from the battery in the evenings.
Its been overcast and raining for 5 days now and the battery pack is very low, but every day I get enough sun to fully charge my phone.

I'm using my phone as I normally do to read the news, check email, listen to music, etc. (normal is different for everyone, I know), so I'm confident that if there was an extended blackout (like in PR right now!) this panel would keep my phone well charged.

In one sunny day this can charge my 3000mAH external battery from 0 to 100% by about 1400.

One drawback:
The port on the back of the panel is not water proof.  If you are using this outside in a dusty, wet, or salty environment this will surely be a problem.  If this unit had an integral ~1m USB cable then that non-waterproof connection could be tucked inside a backpack, inside your window, or otherwise taken out of the elements.
734344
the solar cell is real. however if you open it you will see that its not actually connected. this is howerver a useful cell for other applications. one star for false advertising.
1878256
If there is one thing we can all agree on is the ultimate need of battery chargers. Our smart devices juice battery like there is no tomorrow. This is due for various reasons but also because we have some many apps running in the background giving us updates every 30 seconds.
I own various power banks for that reason. What has been very difficult is when our family goes camping. We often decide to rough it out and sleep in tents. That means, no electricity. Yes, this is indeed roughing it. We then turn off our cell phones because we do not want to use our batteries.
The Aukey Solar Panel PB- P4 has 21W solar charging panel can be the solution to such dilemma. It is built with Sunpower solar arrays, solar conversion efficiency p to 23.5%.  I have tested it with my iPhone, Samsung Galaxy, iPad and I can see the charging bars.
It is water resistant. In order words, if it sprinkles you will have enough time to bring it inside. I would not recommend that you leave it out over night to test it in the rain. Such feature makes it viable for our camping needs, and hiking.
In terms of charging, I am pretty satisfied with the results. It is fast charging. Although, it is not as fast as some of my other chargers. Yet, faster than some. Therefore, I cannot really complain. It charges up to 2 Amps per port or 4 amps overall under direct sunlight. This is a convenience and a drawback. I have not found a way to get benefit of the direct sunlight without leaving my phone in the sun as well. I am not ready to test my expensive phone with the sun.
This solar panel is a great one to have. I consider it more as an emergency and periodic use. The Nortwest does not have too much sun to offer anyway. Again the benefit of it being a life saver is non argumentative. Yet, it provides an avenue now and a reason to use our smart devices while on vacation.
2412390
Governs charge from 14W Harbor Freight 12V 35 Ah AGM with impressive speed.  Third red diode from left indicates ANALOG battery charge.  Brighter, more near to full charge.  Seems to not over charge. Erratic and intermittent solar power regulated well . So impressed with performance, SODIAL 20A charge/load controller ordered.  Instructions say to CONNECT TO BATTERY before proceeding.

Green solar panel output diode  is analog too!
83524
This solar panel impresses me a great deal.  I first started thinking about solar technology after Hurricane Sandy, I was stuck for 5 days with a dying cell phone battery which I kept off and charged off my laptop's battery.  It worked fairly well but after that I never wanted to be stuck like that again.  I also wanted something for when I'm on the go.  I've looked at many options and finally settled on this panel, mainly because it was on sale.  I feel like it far exceeds the value of the $30 I spent on it.  It is a little big, but still small enough to fit in my backpack.  The dual chargers are very nice too.  I have a dual charger USB battery box and a smaller Duracell USB battery box.  Both fit snugly in the mesh netted sack which has the USB adapter.  And both charge fairly quickly from 0% if left outside.

The ONLY reason this isn't 5 stars is because of that mesh sack & flap covering.  I wish it was larger and waterproof, it seems like they could have made the flap that goes over the sack into a pocket to keep the internal components more secure.  My main concern is I don't want moisture getting in there by accident and corroding anything.  And that open design doesn't prevent that.  I'll probably end up modifying this soon.
1368730
On a clear day it can charge my phone (Sumsung Galaxy Note) just as quick as a wall charger.  My phone has trouble charging on partially cloudy days if I'm trying to charge another device at the same time.  My phone won't charge if it is so cloudy that I cannot see my shadow even though my phone is the only device connected to the solar panel.

I like it.  The solar panel is light, compact, and works very well with unobstructed sunlight.  However, I see some obvious areas for improvement.  The pocket is too small to hold a modern smart phone.  My Google Nexus 5 and Sumsung Galaxy Note do not fit into the pocket without extreme stress on the micro-USB connector.  The pocket is about 7 inches by 5 inches with the USB ports positioned in a location that prevents anything longer than 4.5 inches from lying flat.  I have a light but large capacity USB battery (Konnet PowerEZ Pro) that I planned to use with this panel.  Although the USB battery does fit in the pocket, it is an extremely tight fit due to its height.  It also looks like the panels are easily scratched.  I wish they were more scratch resistant.
3434712
I was largely guided by the good reviews on this product. If I had experience with other testers as to accuracy and convenience of use I would have a yardstick and would happily give it a 5 star rating. But I don't.
The Solar is certainly easy to use and gives a rapid result. I must confess to have bought a battery load tester as well to give me confidence in what the Solar was telling me.
Long and short is that I am happy with it and would recommend this product to others.
2632036
The EnerPlex Kickr IV is a portable 4-panel solar charger for 5V USB devices. Folded up, it is 9 x 7.25 x 0.5 in size. Unfurled, it measures 7.25 x 30. The charger features four solar panels on a flexible plastic base, four grommets to use for securing the charger to a backpack, tent, or whatever you like, and a USB outlet on the front. It comes with 4 black elastic bands that can be used to secure it to something and a 36 black USB charging cable. The charger seems durable, but you should not get it wet. The output is 5V/1.2A. EnerPlex claims that it charges as fast as a wall outlet, which is true if compared to cell phone chargers. But my Apple iPad wall charger is 5.2V/2.4A, twice as much wattage as this solar charger. So this is not going to charge a tablet quickly.

Its been overcast and rainy for several weeks here, so I had ample opportunity to test the EnerPlex Kickr in overcast weather. It doesnt charge in overcast conditions. I tried three times, leaving the charger out as long as three hours. I couldn't leave it longer, as it always started to rain. I got no charge whatsoever on those occasions. In bright, direct sun, I got 1,064 mAh out of the charger per hour of exposure, with the solar panels lying flat on the ground. This gives you an idea of how much power you can get, but that may vary with the intensity of the sun and the position of the solar panels. An iPhone 6 battery is 1,810 mAh, so it should charge in 1.7 hours of bright sun, close to the 1.5 hours that EnerPlex claims. My iPad 4 has a 11,560 mAh battery, which would take 11 hours.

Because the EnerPlex does not charge in overcast weather, and intermittent sun slows it down a great deal, I suggest charging a battery pack, preferably a big one, while the sun is bright, so that you will have power for your devices when its cloudy. My reservation about this charger is that it does not have a pouch attached to hold your device phone or battery pack- while charging. If the charger is attached to a backpack or tent, where do you put the device thats being charged? Temperatures in the sun can easily reach 130F, when it is 90F in the shade, which is too hot for most mobile devices. An insulated pouch attached to the back of the charger, near the USB outlet, would provide protection from heat, cold, dew, dirt, etc. An oversight on an otherwise good solar charger.
4551859
As my first venture into solar energy this has been a nice panel.  I've had it about a month.  I paired it with a "Xantrex Technologies 802-1500 XPower Powerpack 1,500-Watt Portable Backup Power System" and a "Sunforce 60032 30 Amp Digital Charge Controller".  The panel is 12 volt, 4.6 amps though at this point I'm seeing up to 13.6 volts and 5 amps.  I suspect over time as the panel weakens it will be more toward the 12 volt, 4.6 amp.  The panel was simple to hook up and came with what was needed.  I did go purchase new wire as I needed more distance for where I mounted it.  I'm able to charge the battery from dead to full in 2 days.  If I were to rotate the panel through the day I feel I could fully charge in 1 day.

Nice for backup charging and learning.  For any real application you would need a ton of these though.
2621522
Works well in my Midland video camera with run time of 2-3 hrs. immediately after being charged.  However, these batteries suffer from rapid power loss on storage; where OEM batteries hold most power for over a month, these batteries lose well over half their charge in a week.
3144755
This case is very well designed, and delivers the expected performance without making any sacrifices to quality.
It's simple to use, and provides more than double the capacity of the phone's own battery.

I found that the pieces fit together perfectly, and provide a very snug and secure level of protection for your new iPhone.  While many "portable" chargers have a much higher capacity, the advantage here is that it becomes integrated with the iPhone and contains sufficient reserve power @2400mAh for the majority of users.

With a single moving part, the charge button, operation is quite easy and the array of tiny LEDs on the back instantly displays the approximate amount of energy remaining at a glance.
1522552
Up front, I would like to note I received this item at a reduced price in exchange for an honest review.  I just received this in the mail today and did a quick test with my iPhone.  I plugged my phone into the charger for 20 minutes.  During that time I placed the solar panels in direct sunlight, but it just so happened there were quite a bit of clouds in the sky so it would become  overcast at times.  Even with some overcast conditions, along with the direct sunlight, my phone went from  31% to  38% in 20 minutes.  That is a pretty good rate.  From this increase, I estimated I could fully charge my phone in under 5 hours.

Also I really like the quality of this solar charger.  The rigid solar panels are held together by a nice quality nylon fabric and the whole unit folds down into a compact rectangle that velcros closed.  It is well put together and a nicely thought out design.
165611
I haven't found anything wrong after initial use.  I use these on light panels and the 160 LED panel I have ran for 2 hours at full power with this battery on it.  Pretty impressive.  Can't speak to compatibility with cameras, though.
41347
I'm very happy with the performance of this battery. It came with a very helpful little instruction book that explains how to calibrate the laptop to the new battery, The laptop recognized it right away and I've now got 50% more capacity I had with my old tired battery. Windows powercfg /batteryreport lists the cell brand as Sony rather than Samsung, but I'm not sure how it knows. Either way it appears to be name brand cells and well made. After three discharge/recharge cycles, Windows reports the capacity to be about 61 Wh, which is more than the 53 Wh that the battery is rated at.