After many disappointments with other machines, I opted for the latter equipped with a 10 volt battery for who said many volts also said to the available power. The battery is new but it has held the 75 minutes advertised in trimmer function. The blade change request a little attention and few tries to understand its operation. The two lock buttons on either side of the machine to the cutting head are well embedded in the head (to prevent from deteriorating too quickly during impacts during labor) and their use is "tricky". We must sink them and that a major effort to control the tip of a finger. Perhaps with time the system will soften. It is important to clean the knives after use because of small waste slip into the rotary head compartment. This did not hinder the operation of the machine but in the long accumulation certainly will risk impairing its operation. Used on the support of the brand (Bosch 2609003869 telescopic handle for AGS and ASB models), the trimmer is effective and bit tiring to handle. In direct use (without telescopic handle), the machine vibrates but it is very tolerable and normal: they are the knives that cause these vibrations because of their movement roundtrip cut. Here is a purchase (not really given the price point of view. But quality always pays some) that gives me satisfaction. The future will tell me if this is confirmed. The battery can be changed but this requires opening the machine. But not too awkward a handyman can do it. I can not give an opinion on the life of the battery, since the machine is brand new but it delivers 10 volts are fearful about the shot work. Even my lavender succumbed to the onslaught of the edger. I have not even had to use the size-hair shirt. I tested the hedge trimmer on a box: result quite correct. The machine is very handy and relatively lightweight compared to my normal hair shirt-size (60 cm knives), there is no comparison. This little tool is really effective. Of course, he does not dream: want to cut the branches of 2 cm diameter ... forget. We are talking about an edger and trimmer, not a pruning tool.
