I kept for 11 years the old model ER 153 without any problems, except for a replacement (normal) battery. This model takes over. It is more ergonomic, the engine runs much faster + and the charge time is spent de8 pm to 1am. In addition, an LED indicates the lack of charging and charge termination. The blade system is exactly the same. It seems to me that the hair spend less inside the head on this model. The wheel to adjust the cutting height is slightly less convenient but we avoid turning inadvertently during use. A truly professional product.
