Bests & Worsts Reviews from Amazon

I bought this one month ago fully charged it and put it in my car "in case". The secondary reason for buying this was so I could use it to charge my phone and iPad while camping. When I went to use it last night to charge my phone the battery only had half a charge (after only 1month) I completely charged it in the car while driving around today and it won't charge my phone and the lights won't even come on in the back. I'm aware I should have tried it before now but the window for returning it is closed and it doesn't work. Please tell me I didn't just throw away 150.00.