I am with Frazer in the school of thought that one should buy that which one already has more of the same batteries. That being said, I have stuck with Black and Decker. I had already a cordless weed eater and a couple drills. Though you will likely not find a cordless grinder from B and D. That being said, I have a bit of a rant to express and the reasoning for staying with B and D. It was about a year ago, more or less, that I was thinking about getting a cordless circular saw and reciprocating saw. I went to my local ACE, and, to my dismay, found that the current trend among most of the manufacturers is to just sell the tool by itself and the battery and charger separately. WHAT! It had been some years since I had bought any cordless power tools and I was incredulous. It seems to me that they are really more into selling batteries now than to sell tools with batteries and chargers together. Of course, they have such bundles, but I was not about to pony up that much cash for a tool, charger, and one battery. So I shopped some more online, which confirmed that the trend is the same for most of the major power tool brands. So I bought a four tool combo deal from Amazon, Black and Decker. Came with, wait for it...a charger and battery. I since bought another weed eater, same battery type, so I have 7, 20v Max batteries at my disposal. I expect that some might express a disdain for that brand, as I was skeptical at first when I bought a cheap drill of theirs. I thought at the time that I would be the crap of the thing and just throw it away. Despite all the beating it up, I have not yet thrown it out, it is still going.