My experience: Bought a Makita 9V drill ~20 years ago. Came with two batteries. Great little drill. Eventually one of the batteries died. Bought a replacement battery to have two. Cost more than 50% of what I paid for the entire kit. Eventually the second original battery died. BY that time, a replacement battery was more than a brand new Dewalt 18V kit. Bought the Dewalt 18V. While Dewalt branded 18V batteries are pricey, the generic batteries are still reasonable. Just purchased a 20V Dewalt drill for the smaller form factor. 20V drill feels like it has sufficient torque to do bodily harm if not careful. See no reason to go back to Makita.
Observation: Had a project at church a few weekends ago. At least 75% of the battery powered tools were Dewalt. Did not notice any Makita products...
