From: emr97@uno.cc.geneseo.edu Subject: D-cell battery-pack for the D7/D8 (yellow-tip plug) Date: Wed, 16 Oct 1996 00:22:44 -0500 (EST) You can now get the 1.7mm yellow-tipped plug from Radio Shack without having to buy the $12.99 car adapter. The part number is : 270-1575 The price : $2.99 So this simple little project now will cost you about $5 (includes tax).