The GRDE solar power bank is listed on Amazon with a capacity of 15000 mAh. It’s about the size of a large smartphone but more lightweight than I expected. I real world tests, I found the capacity closer to 10000 mAh. That’s enough to charge a smarthphone several times or a tablet once, depending on the device. The charger has a flashlight with six LED bulbs built in, bright enough to light the way in a pinch.
Like many other solar power banks, the solar charging is to be used as backup only, perhaps to extend the life of the battery while outdoors. From my tests, I found that one hour of sun gives about 260 mAh, which is enough to give my phone a 10% charge. That’s impressive for such a small solar panel.
This product was provided by Greentimeszone.