Disclaimer: IEsafy sent this product to us for free for a review. That does not affect our opinion about the product. In this article, we list both what we like and dislike. Read more about this here.
Should You Get A Small Power Bank That Has Built-in Solar Panels?
Portable power banks have been popular for a while now, and I know that especially travelers like to bring along some extra battery power when they’re going to be away from outlets and USB ports for a while.
Lately, companies have built in solar panels into the power banks. So you’re able to charge the battery as long as the sun is shining.
But do they actually work and worth spending money on? The panels are obviously tiny because it has to be kept portable, and even though a portable power bank might look small, it can hold a lot of power.
A company reached out and asked whether we would be interested in reviewing one of these, and we agreed to since we would like to find the answers to the questions above.
Update 2025
Unfortunately, the IEsafy power bank has been discontinued. However, here are three options on Amazon that offer similar features for travelers and RVers:
The Solar Power Bank We Tested And Will Review
Of course, not all portable power banks with built-in solar panels are made equal. Our experiences with this specific brand and product will not apply to all the other brands out there.
It’s unclear what the company that makes these is called, since no name is mentioned on the Amazon listing.
On the power bank itself, it says IEsafy though, so I am going to refer to the power bank as an IEsafy product.
Features
The power bank itself is a pretty simple one, with a 26,800 mAh battery. That’s the largest power bank you’re allowed to bring onto an airplane. The TSA limit is 100Wh, and 26,800 mAh is 99.16Wh.
With a battery that large, you can recharge most phones 5-10 times and most tablets 3-6 times.
You can look up the mAh capacity of your specific device with the help of Google, then divide 26800 by it to get a rough estimate of how many times it will charge that specific device from 0 to 100%.
For example, my iPhone 13 Pro Max has a 4352 mAh battery.
If we do the math (26800/4352) we get 6.2, which tells me I should be able to charge my phone about six times before having to charge the power bank.
There are two USB A ports and one micro USB port. The large USB ports are the outputs, and the micro USB is used to charge the battery.
The input is rated at 10W, but a wall adapter is not included.
You can charge two devices at the same time and up to 2.4V, which is 12W.
The four solar panels fold out and, according to the listing, they are 1.5W panels, meaning that four can generate up to 6W.
There are battery bars to show the current charge of the power bank. These light up when you push the power button on the side of the battery.
It’s IP65 rated, so it’s water- and dust-resistant. You should not submerge the power bank in water, but some light rain will not hurt it.
Since the USB ports are covered, you don’t need to worry about water or dust getting in.
IEsafy includes a micro USB cable and a compass carabiner. The compass did not work right out of the box.
Last but not least is the built-in flashlight, which shines really bright and can come in handy if you’re out camping.
My Review Of The Solar Power Bank
The Battery Capacity
I like power banks that have a 26800 mAh battery capacity since I am a traveler and I need something I can bring onto an airplane. There is nothing to complain about there.
During my tests, I didn’t have any issues charging my iPhone 13 Pro Max several times over.
The Ports
It’s great that I can charge two devices at the same time with the two USB-A ports.
It should have a USB C port in 2022 though, since most new portable devices use the newer USB-C port.
A USB C port could’ve been used to both charge and discharge the battery, instead of having the old, dumb, and slow Micro USB port.
IP65 Rating
The IP65 rating makes it so I can leave the power bank at my campsite during the day and not worry if it rains.
I don’t recommend leaving it out in heavy rain, but in my tests it didn’t have any issues after being left out in a rainstorm.
The Solar Panels
Here is the thing with the solar panels: if you expect them to recharge the power bank fully and never having to use a Micro USB to charge, you’re going to be disappointed.
Even if the panels would generate 6W while in sunshine (which I doubt, most likely closer to 2-3W), it would take 3-4 days if you get a full five hours of sunshine.
It got nowhere close to that far in my tests, and when using the more conservative 2W estimate, it would take over 10 days to charge it from 0 to 100%
The solar panels are useful as an emergency backup, meaning that if you find yourself when you need to charge a phone just to start the phone and make a call, they will do that.
You should not take off on a camping trip and expect to only use the solar panels to keep the battery and your portable devices charged.
If you understand this when you purchase it, you will not be disappointed. Just be realistic and aware of what’s actually technically possible.
Portability
Even though it has a 26800 mAh battery, foldable solar panels, and a flashlight, it is portable.
It fits in all of my backpacks that I use for quick trips, for long backpacking trips, the 1.37 pounds will matter more.
Conclusion
The question was – do solar power banks work and are they worth spending money on? At the end of my tests, my answer to the question is no, unless you’re a very specific type of buyer.
If you understand that the solar panels won’t be the primary way to charge the battery, and are okay with only using them in emergencies, it’s not a bad product although there are better options on the market.
If you’re anybody else, buy a different power bank. I recommend getting the most portable 26800 mAh power bank, with USB C ports for both input and output.
Then, if you would like to recharge the power bank with solar panels, buy a separate panel. There are lots of portable panels on the market with USB ports.
That way, you can plug your portable devices directly into the solar panel during the day and use the power bank at night.
