I have the Super Cub RTF with the 8.4V 1000mAh NiMH battery. The charger one that goes in the cigarette lighter is broken. I have the Triton EQ AC/DC Charger for another plane. Can I use this charger for the Cub 8.4V 1000mAh NiMH battery to be charge? I looked for the adapter but there is none that matches the end or do I need to purchase one?

Of course you can. The charger doesn't care what you hook it up to as long as you get the numbers right... mah rating, number of cells, chemestry, and so on. The only problem comes with the adapter you will use to connect the battery to the charger, as you said. But red goes to red and black goes to black... not rocket science there. You can make an adapter easy enough.. go to Radio Shack and get what you need and go for it.

CGr.