THESE SKIDS USE THE NEW "KEYSLOT" BATTERY TRAY FOR THE NEW 2010 BATTERY! 

The old style battery will work in this skid, but will feel very "tight".  You can shave the "nubs" off the old battery with a hobby knife to make it easier to insert.

 

The new 2010 version includes a connector for the new receiver.  If you would like to use these with the old receiver, just clip the connector off and solder as you would with the old skids.