So I personally use this device for years on business and I can not think of a better present extremely reliable, robust and accurate, the batteries have a tremendous operating time and if you should unscrew three days continuously so this is no problem with the 2nd Battery especially the charging time is relatively low so you always have power when you need them. What is also very interesting is that the performance is always equal to the battery is empty the machine switches abruptly. Due to the large and very stable chuck it is recommended even for larger work best where it is always always in advantage over other machines chuck 13mm are not a problem I would but buy me only once often you do not need indeed because it keeps living a long with proper handling course ;-)
