ADDTOP Solar Charger 25000mAh, Portable Solar Power Bank with 4 Solar Panels Outdoor Waterproof External Battery Solar Phone Charger with 2 USB Ports for iPhone, iPad, Samsung, Smartphone and Tablet

UPDATE: 14 OCTOBER 2018Still working perfectly, no problems. it charges well..........................................................................................................................................................................................This is a high-quality product, judging by its construction with tough, dense, and durable, materials. Stitches are perfect. The output is as claimed; I've tested with a diagnostic meter. I left it outside in the sun for a few hours and got a decent charge for my phone. Did not expect these little 4 solar panels are so powerful.____________________________________________________________________________________________PROS:1. Amazing built quality: the plastic is rigid, USB Ports are framed well and overall I can only praise its quality.2. Charging the power bank via USB is okay, not super fast but I am okay with it.3. Charging the power bank via 4 solar panels exceed my expectation (3-4 hours in the sun gives around 40-50% on my iPhone)4. Built-in (bright) flashlight makes it great for camping or/and other emergencies.5. Lightweight & compact easy to carry (its smaller than an iPhone plus)6. Easy to use; easy to read battery level indicator7. Polite customer serviceCONS: none whatsoever, will keep you updated.____________________________________________________________________________________________Highly recommend this product.

I have seen the previous reviews and decided to give it a try.This solar charger does its job. The only issue is that the solar energy transfer is very slow and the efficiency is limited by sun intensity. I guess this is less the problem of the product itself, but more on the solar technology development so far.It has to be placed under the direct sun for looooooog time. I’m not talking about hours, but at least a fews days to get it charged over 60% and up.With that said, charger by itself serves as an emergency backup, not a regular charging method, especially for solar charger. You don't need to fully charge the charger to charge your device.I left it right next to the window. Sometimes there is direct sun, and sometimes not. It charges to about 25% (indicated by one light out of four on the charger) for one day, and could not pass that even after 3 days. With this much on the charger, it could charge my iphone to about 45%.It weighs 540g (19 oz, see the picture). This is not light, about twice as heavy as my phone. For backpacking or climbing, you may want to consider its weight. If it is just a short one-day trip, a small and light regular charger is good enough. This solar one could be over killing. They do have a smaller version (24000mAh, 3 solar panel instead of four) and presumably lighter. Have I known this, I will buy the lighter version.For camping or other situation where weight is not a consideration, this will be a good choice as a emergency charging method.Another small point is the labeling. On the back of the charger, it says 25000mAh/92.5Wh and both input/output 5V. Using the high school physics and doing the math, the voltage should be 92.5Wh / 25000mAh * 1000 = 3.7V, not 5V. I have another regular charger which labeled as 3.7V. So I think what it indicates is that the actual voltage of the solar charger is 3.7V, but it can accommodate device labeled as 5V.

I got this in anticipation of Hurricane Michael. It seemed like a great idea: a battery pack that you leave outside to charge from solar energy, then bring in to charge your phone or the like. Now, it doesn't really collect all that much energy -- and I say that as someone living on the Florida panhandle, and if you can't get enough light to charge your solar doodad in Florida, then perhaps it's time to return to the drawing board -- but I was fine with that, as I anticipated a couple of weeks without power, and if all I got charged was my phone and my kindle, I'd be okay.But the limited amount of charge in a given day means that you've pretty much got to leave it outside all of the time, and that's where it all goes wrong. A bit of rain fell, and the charger/battery was soon fallen as well. Folks, the basic logic here is, "if it's a solar electric thing of any kind, it MUST survive some rain." This fails on that score, utterly and sadly -- I love the whole idea and physical design. Maybe the 2.0 version will succeed better.

After my power port broke in my old car I was in a predicament when it came to keeping my phone charged while traveling. I purchased this in a flash sale to test it out. I was not disappointed. After purchasing a USB to USB C cable I was able to keep my Pixel phone charged and still use it for GPS mapping. I initially charged it at home off an outlet. Now whenever I use it, if there isn't enough sun the charge will come off the battery. Works great even on overcast days. Very happy I got it, while I save up to get my power port fixed. (aka cigarette lighter).

Very good to get several charges on I phone , great back up but a little heavy to carry on long trips in backback

Haven't tested it out yet. The solar charger is functional. If you unfold the panels in your house with the light on the charging light appears, so solar charging will work. It has a nice weight to it that makes it feel well made and durable. I wouldnt want to drop it however. The price for the battery size, solar charging and light make it a good purchase in my opinion.

Bought this for my husband - he loves the outdoors and he is very happy with it! I’m happy too since he never loses battery life and we are able to contact him anytime!

The solar panels fold up and hide very nice. Covers all fit tight. Looks very nice. Great sized battery. Solar for emergencies when camping or out and about. I love it.