Gel Cell and Lithium Ion and ChristmasSong: "Mrs. Santa Claus" by Jingle Punx, from the album "Coal" Intro: Feedback: John, M0JFE, likes the show and asks for a show about packet radio.Thanks, too, to Bill at SolderSmoke for the mention.Damon, NN7B, listens to both shows, and asks how sealed lead acid batteries compare to nicad and nimh for a grab-n-go kit or mobile station?Donations: Thanks to David, no callsign given, in Pleasonton, CA, andJerry, KD0BIK, of the Practical Amateur Radio Podcast.Click through the Amazon link at our site.Song: "Goin' On a Date With Santa" by Dr. Elmo, from the album "Up Your Chimney"Buzzword: Song: Topic: Gel cells are a type of valve-regulated, lead-acid (VRLA) batteries. They have a pressure-relief valve to allow venting of hydrogen during overcharging, and a gelled electrolyte. Theyhave a greater resistance to extreme temperatures, shock, and vibration than typical wet-cellbatteries like the common car battery.(Contrary to what Richard says, hydrogen is a colorless, odorless gas. The "rotten egg" smellfrom an over-charging car battery is due to the creation of hydrogen sulfide gas, H2S. -Ed.)http://en.wikipedia.org/wiki/Hydrogen_sulfideSong: Conclusion: Closing song: Read More About Resonant Frequency: The Amateur Radio Podcast At www.rfpodcast.infoGlossary - See Glossary for terms used on the show.