I purchased an EGO lawn mower last summer and I love it. I am looking at purchasing a snow blower and possibly a chain saw. I do NOT need a battery for each of these units since I will buy new units that use the same battery type. Why have four batteries when two would be more than enough and be more cost efficient. However, it is price prohibitive to buy units without batteries and then buy one separate battery. For example, a snow blower without batteries retails for approximately $400. A single 5.0 battery retails for approximately $250. So to purchase a snow blower with one battery costs $650. Conversely, I can buy a full two battery snow blower for approximately $600. This is not efficient use of resources and is cost prohibitive.
I love buying kits and getting a great discount on the batteries and building my inventory of POWER.
Why wouldn't one want to get extra batteries anyway? Using Tim's example, a snow blower with 2 batteries means you get one battery for $50 less than the price of a stand along battery, and the second battery is free. Believe me, you'll like having extra batteries. Always better to have a few extra that can go into rotation instead of only having one or 2 and one or both of those conking out leaving you unable to run any tool and having to then pay full price for a battery just to get back up and running.