Accu can easily swell.

I have the Accu bought in August 2013 and used since in continuous use, ie daily charged overnight and operated during navigation in the car in trickle charge. As Accu I am convinced of the power, clear improvement to the original.
In October this year, ie after 14 months service the accus, tore my display glass from the center a spider web-shaped. This in spite of use of a protective sheath and no specific reason. The error image looked like caused by mechanical stress. For repair, which has since been carried out successfully, but cost me be 49 and 4 days without phone, I have taken out the Accu. And I realized that it is swollen, ever. approx 05 mm upwards and downwards. In today's space-saving manufacturing of mobile inner life, is close to me that in the increased space at least a contributing factor for the break of the display glass can be seen. So if you want to use his cell phone for over a year, these people should give it yes, and will not take any risks, should in my view stop buying.