Battery ordered on 20 February 2014 in 25.02 since operation, now broken !!! How can that be ???

I wanted some reviews not believe! Was initially excited because he held two days ....
Now I have to but again order a new battery. And after 2 months!
Since about 3 weeks the battery discharges very quickly (within a day). Now he invites overnight, at 10 am it is already at 70%, and at 16:00 clock it goes - as less than 30% - in the saving mode and red.
Conclusion: I'm too poor to buy cheap, because who buys cheap, buys more than once! There's something to it!