Raddy SP4 4W Portable Solar Panel, 5V 0.8A Foldable Solar Panels Emergency Kit for Outdoor, Compatible with All Weather Radios SW10 SH-905 SW5 SL10

I carry this with a small 5,000mah battery. The solar panel supplies enough power to charge my phone at a higher rate of charge but not at a rapid charge. It seams to be well built. No complaints so far. I have purchased another one and will see if the quality and performance is consistent.

I was pretty impressed at first! Looks good and seems like it's water resistant (to an extent) comes with three head USB charging cable for you choice of devices to charge, this will passively charge or trickle charger you're devices so I don't think you'll be able to get a real charger but any charger is good enough right!?

This solar panel about the size of the common smartphone (when closed) is great for devices that use very little energy like a small flashlight, small power bank, or a little radio. It’s something good to have around when power goes out or great practice with off grid power for small devices.

Worked surprisingly well. Much better than expected!

Have not used yet

Eh, it's probably an okay trickle charger if you need something as an absolute last resort. But don't depend on the thing. If this is your primary means of charging your phone, you may live in a third world country.

I have a larger capacity folding solar panel for my bugout bag (25+W), but it's significantly heavier than this one (over 1.5 pounds) -- this is for my kid's bag. While you're not speed / fast charging anything with only 4 watts (in ideal light), it's still giving you something....albeit borderline comical when I plugged my phone in at 48% battery remaining, and my phone told me it was a whopping 3 hours 50 minutes to a full charge. Obviously smaller capacity electronics wouldn't have quite that long of a charge time, so it's all relative, but no matter what you shouldn't expect to fully charge anything in a reasonably short time frame -- this is used to get you that much further along in an emergency. If it gets you another 2 hours worth of a flashlight charge while you're trekking after a full day's hike, that's 2 more hours than you would have otherwise had. It's compact and LIGHT...my scale shows 4.7 ounces with panel + included multi-cable charging cord. When you're talking about elementary school aged kids, the lighter the better, and this fits the bill. A single button snap keeps it closed, and it has four (small) grommets -- 1 at each corner -- to tie down to a backpack while on foot. If you weren't walking-while-charging, there is no kickstand or anything to keep it up, so you'd need to lean it against a rock, tie it down to some stakes, etc. There is a green light where you plug the multi-cable cord into that visually shows you when it's receiving solar...and I confirmed through testing that this does still work in low-light and partial shade (although I'm sure that is diminishing the optimal 4W by some degree). As long as you go into this with the right purpose in mind, and in my case as a way to harness the power-of-the-kids to help in their share of getting certain lower-capacity electronics even a little bit more charged, it's a great lightweight method to do so.

We use this on camping trips and we ride long distance biking

5 out of 5 Stars (5) ⭐⭐⭐⭐⭐ [TL;DR] [QUALITY] (5/5) [VALUE] (5/5) [EASE OF USE] (5/5) [MET EXPECTATIONS] (5/5) [PACKAGING] (5/5) [REVIEW REMARKS] This is a decent portable and packaged solar panel for charging your devices with the use of the sun. The design is quite compact and it is foldable. The solar panel is a little flimsy and I am afraid that this will not do well in extreme weather conditions. The panel snaps closed when folded. The panel also has corner grommets (4 total in each corner) to be able to hang this panel from your bag, or on any other object. The package included a foldable panel and and cable with a MicroUSB, USB-C, and Lightning cable (three connection combo) on one end and a USB-A connection on the other which plugs into the power. The panel has a green light on the back that indicates when the unit is receiving solar light and in charging mode. It is very important that the panel is placed in direct sunlight to work the most efficient. The panel does charge connected devices, albeit, slowly. This panel could be a lifesaver in emergency situations where a depleted device could be slow charged overtime. This would be a great thing to pack while camping or hiking. It could be used to charge a radio, cellphone, GPS unit, etc. This unit can be used to charge external video cameras, like security cameras. However, I do not think that this would be the best unit to use. I tested my solar panel on a depleted security camera and it seems to be provide an ample slow charge. I am merely using this as a testing device and I would not suggest this solar panel be used for this function. A mountable solar panel would be a more suitable panel to use to charge your security cameras using solar power. This panel is quite lightweight and it does blow in the wind. All in all, this is a decent solar panel. It is quite compact and it folds and snaps closed. The multi-ended source cable is great for emergency situations, as most connection ends are represented. I am still a bit concerned how this would perform in extreme weather conditions. Now that the cooler/cold weather is upon us, I have it outside charging my camera. I will update this review if anything changes -- like if it stops charging in the cold. I recommend this solar panel based on the ease of use, portability, its foldable and compact, and it is a decent value. In the event that experiences change or evolve, updates may be made to this review to address such developments.

Obviously this is only a 4w panel and so charging a phone takes hours but 2w of output in full sun is a minimum and 3-4 w is achievable, which is remarkable for a tiny little panel. This only weighs 113g (4.2oz) and it's only an inch longer and wider than my phone when folded in half. It's so light that the usb port can make it tricky to stand angled into the sun because it's hard to balance. I'm really happy with this. I have a 10w flexsolar panel that is about the same size folded in four and twice the weight yet often has the same output. It's supposed to have 2.5 times the output but they're neck and neck in my experience One really great thing about this panel is that it doesn't drop charging to a phone. A lot of small panels are constantly stopping charging any time a cloud goes overhead. I'm not sure what it is about this charge controller but it doesn't drop out at all and I think that makes a huge difference. I can add about 10-15% per hour in full sun to my galaxy s20 with this and it weighs less than the phone. I really would recommend this against anything even similar in size and it makes a great emergency device for hiking or whatever because it's just so small and light.

Ce petit panneau solaire pliable est de bonne facture. J'ai été agréablement surpris par la performance de ce, somme toute, petit panneau : ▶ l: 10cm ▶ L: 17cm ▶ H: 1.8 cm. Il faut un ensoleillement direct pour qu'il donne toute sa puissance (4W) J'ai pu recharger un de mes petits accus (5000 mAh) en une après-midi au travers de ma baie vitrée ! Bien évidement qu'il ne chargera pas en charge rapide, il n'est pas assez puissant pour cela. Bien exposé au soleil, il rechargeras votre téléphone, accus, etc. aisément. Il est équipé d'un port USB-A et livré avec un câble courts équipé de 3 sorties USB-C, micro USB, Lightning. Personnellement, j'utilise mon câble USB-A vers USB-C plus long. Avec sa petite taille, je le met dans les petites poches sur le coté de mon sac à dos lors de mes randonnées.

Panel solar para portatil de 4W plegable para cargar telefonos moviles, que nos llega bien protegido y empaquetado junto con un cable con tres salidas; USB-C, microUSB y lightning. El panel cuando lo ponemos al sol, estamos en Octibre y no era muy intenso, encendia un led verde en la parte posterior, indicando que estaba cargando. Despues de varios dias expuesto al sol lo conecte al movil para cargar y aunque es verdad, que lentamente cargaba me paredio una perdida de tiempo seguir esperando. Creo que este panel seria util sino hubiese ninguna otra forma de cargar el dispositivo, red electrica, powerbank, ect., pero en condiciones normales no creo que lo use.

It's pretty much useless, it has so low output that it can't even charge single % of phone batter continuously