After over a year of my original battery FirtzFon MT-D has only 15min persevered, so a replacement was needed. Despite not quite as positive advice I chose for this article. Priced at less than 5 you can not go far wrong indeed. The supplied battery had slightly different dimensions than the original. However, it still fits into the phone. When inserting I had only the position of the cable to adjust and press it into a gap, but the lid could be closed well. Since then, the phone holds back due to prolonged Gespärche. Goal achieved!