No, a non-Makita doesn't work, but you can get them with a charger if you don't have one. (Makita BL1850B 18v=5.0Ah 90 Wh )

Unfortunately, no. I bought a drill in the hope that the battery would fit on the coffee machine, but that was not the case. The coffee machine uses older batteries.
Bringing a product onto the market without a charger with a battery is not possible in my eyes.