oh you want $powertool
okay you have the 12V battery system fro $manufacturer but the device you want to buy is better at their 18V system.
Oh you cannot use your old battery or charger.
Do you want a charger that charges all of the $manufacturer batteries regarding of the system? Nope, can't have that.
Oh by the way, the battery charger plus two batteries are twice the price of $powertool
@JennyFluff It's not hard, it's just a lot more profitable not to do it, because this kind of setup creates brand lock-in
@joepie91 yeah but even brands themselves don't offer chargers that works with all of their stuff.
So they can sell more chargers...
yay crapitalism