Workingda Solar Charger, 10000mAh Portable Hand Crank Phone Charger 2 USB Ports Solar Power Bank with LED Flashlight, Carabiner

A+++

(5400mAh version): This is a solid little box that does the job nicely. But ... you have to be realistic about what it can do. First, as a power source it's great, and having two USB outputs is a plus although remember that two devices will charge at half the speed: you have 2 Amps to share. 5400 mAh could charge a Samsung Galaxy S8 (3000 mAh battery) and iPhone 6 (1800 mAh), once each. Second, the solar panels and crank would probably be ideal for a low-power phone but for battery-hungry smartphones it's not worth the effort; save them for the inbuilt torch. That's not a reflection on this product; simply that today's solar cells are not efficient enough for the size. I doubt there's a product available that could charge a smartphone on a single day's sunlight. As an example, 8 hours direct cloudless summer sunlight on the solar panel (5V / 0.4W output) gave my S8 about 13% charge. And that's actually pretty good! The hand crank is fine but you aren't going to want to turn it over for hours at a time. So, I'm happy with this product and would easily recommend it, so long as you don't expect the solar panels or hand crank to power your smartphone. I don't think any product can do that, without being the size of a tent!

This is false advertising I suppose as it can’t charge even a 2500mAh battery which means it has NOT a 10000mAh battery at all. You can use it as a torch but is extremly expensive for that. Dont buy its rubbish.

Seems to work.

heavy, and did not function

This was pretty much as I expected. It is an item you can regularly use as a power bank and in an emergency or away from mains electricity charge via a handcrank

full charge after about 15 hours is discharged very quickly. I think it contains the indicated stored energy!