Great for my needs (adafruit batteries) but reversed polarity. You can use them as is but let them indicate the colors are wrong, or you can reverse the polarity yourself. This is pretty easy to do. Find a very small screwdriver, pickaxe, tweezers, or something with a tiny pointed end and gently pry the small tab on the connector, and then pry the wire out of the connector. Do the same with the other wire, then reconnect the wires to the connector with the correct polarity. Gently tug on the wire to make sure it stays in place. If it isn't, disconnect the cable and bend down the plastic tab on the connector to tighten the cable, then reinsert the cable.