As advised, very lightweight backpack. What about the solar panel, it looks like it is usable only under direct sunlight, since anything less than that doesn't charge the phone. When I point 2 very bright table lamps, I get only 3.5V output from usb, what is not enough even to charge a powerbank. May need to be improved with a dc-dc booster to charge at lower light conditions. The solar panel is flexible. I would say it is like an emergency power source rather than for everyday usage. But normally I can just charge from powerbank through the external usb.

I love its compact size while still having plenty of internal room, and while it remains to be seen how well the Solar Powered part works, I am thrilled ... My only complaint is that there was no instruction booklet with it regarding how to use the USB and Solar functions ... that being said, I did find some helpful information in the product description on this site.

Bought for my son for his laptop/school and absolutely love that it is solar powered! Previously we had one that had a build in power bank but remembering to charge it was an issue at times :-) so this is perfect. Forgetting his bag in the car is actually beneficial now.

perfect product, very light, and tested charging cellphone, works really well

I didn't find the solar panel worked very well to power my device. It was very finiky, I had to be in direct sunlight for anything to happen. Don't rely on the solar panel if that is why you are getting this.

Réponse de notre service à la clientèle

Hi, We apologize that the solar panel did not work the way you were expecting. I have sent you an email and I am waiting for your response!

tres bien tel que la photo mais j aurais aimer savour sii on peux alimenter le sac avec prise usb ou si seulement avec energie solaire