I owned the predecesssor to this model which was a 12 volt rechargable which hung on the wall in its recharger. the plastic impeller came apart (bad plastic or design) and tried to buy the part. I couldn't do it so I bought this 18 volt cordless model. it has considerably less power than the 12 volt, which had a battery about twice the size of the 18.volt. I will grant it is a benefit that the 18 volt has a removable battery so I can change batteries when one runs down but even when the battery is fresh, it does not blow as hard as the old model. Only consider this machine if you have a small area to do and nothing very heavy to blow.