Team Yellow all the way, rhymes with default so you know it works.
But seriously find a brand that is generally good then you only have to worry about 1 type of charger and you can collect a small variety of batteries. I have 5 5amphr batteries that I use for everything, takes up minimal space. The only time I come to using them up is when I mow the lawn and deplete 2+.
Problem with the one brand wonder is that if you join the red army for M18, eventually you'll get an M12 for some reason, and suddenly you're on two battery systems without even noticing.
Big Yellow has the same thing, though those packs look even more similar. It can be useful to have different backs visually distinct.
But seriously find a brand that is generally good then you only have to worry about 1 type of charger and you can collect a small variety of batteries. I have 5 5amphr batteries that I use for everything, takes up minimal space. The only time I come to using them up is when I mow the lawn and deplete 2+.