After much searching, I found a place to get a replacement battery for my Spykee. The original battery got to where I could only use him for about 5 minutes before it completely shut off. I had a hard time locating a replacement. The local battery shop wanted $60.00 to rebuild the pack which seemed exceedingly high. Anyways, I ran across www.spykeebattery.com last week. They shipped out a new battery pack that fit perfectly. I got the middle option on their website and used it for over 3 hours monitoring my puppies at work before I had to leave my desk (which I docked it then). I'm loving it and wanted to share in case anyone else was having problems finding new batteries.