You would need to buy a belt bag to carry the battery in or carry the backpack, I have all 3 but the BGA 100. AP 300s has 25% more juice than the AP 300 I'm led to believe and looks like 100 minutes but take a look below. https://www.stihl.co.uk/STIHL-Products/STIHL-Cordless-Power-Systems/AP-System-Large-Gardens-Professionals/AP-System-Blowers/2107822-61632/bga-200-blower.aspx
I was led to believe Timber Wolf was the best chippers. ?