I like to have this as a portable charger for school. I never really need it because I have a droid turbo. But when I need it, it is handy. But it only gives my phone 30% ( phone had a big battery.). So I decided to ditch school for a day or 2 and live in the woods. And see how well it will go. So here is my day by day log with it and the attachable solar panel I bought too:

Day 1: I have deserted my self in the middle of this forest area in a place that isn't so vegitated with trees so I can get sun light.
Day 2: My dope solar panel has charged this phone by a little. I don't know if I can survive this long with this power. So I plugged my other solar panel in and got more power
Day 3: My phone can not get wifi out here. I don't know what to do any more. I can't Google how to make a spear. I can't even buy one off amazon. Plz halp.
Day 4: I am lost. My phone is at 69% and I have no one to text Lol to.
Day 5: I managed to make a deadly weapon with my socks and a rock I found. I will use my rock-sock to beat these bears for their food.
Day 6: Plz Halp. I lost a leg and my phone is at 23%. All I have is a rock-sock.
Day 7: I have made it a week out here. I gave my self a peg leg with a tree I have taken down.
Day 14: life has been good. My phone died 4 days ago and I managed to use these solar panels to power a small help signal with the remains of my dead phone. I don't know Morse code so I just sent random tapping. Idk what I am doing.
Day 21: I have gotten a signal back from someone that has tracked my signal. They seem sketch. But it is cool.
Day 22: the guy has came and saved me. With out these solar panels idk what I would have done. I recommend them 10/10.

These are pointless.. I bought them for camping and festival usage, with-in days of having them they would NOT charge or keep a charge.. I had two of them. Just came across one in a box of junk today and shook my head. Waste of money. Great idea, but no delivery on promise.

Doesn't work for crap.

Works great.. the only complaint I have is that the solar will only charge 50%, but charges quickly with solar.

This is light weight. Charging with solar does take sometime, but it's better than not having anything in a emergency.