I have a PC680 battery in my Mustang 2 and it is great and small. It is pretty much the standard RV battery. They make smaller versions also. They are heavy though (not as heavy as most lead acid, but heavy none the less).
If I was buying a new battery today I would get a LiFePo4 (Lithium Iron Phosphate). These are almost as light and high capacity as Lithium ion and Lithium Polymer batteries, but they are much safer. Li and LIPo tend to explode or catch fire when abused so I do not recommend them, but LiFePo4 are safe. There are many Lithium iron phosphate batteries you can buy today, but they need special balance chargers and other protection methods. The only ones I know of that have all of that already built into the battery are from EarthEx. http://earthxmotorsports.com/product-category/experimental-aircraft I have one of the small ETX12B batteries that I bought for my avionics backup. It is 1.3 pounds and can back up all I need for IFR for longer than my engine can run on a tank of fuel. I will be getting one of their larger batteries for engine starting when my PC680 dies (which from experience of others will not be for many years). -------- Original Message -------- Subject: KR> Battery From: Mike Stirewalt via KRnet <krnet at list.krnet.org> List-Post: krnet@list.krnet.org Date: Mon, October 12, 2015 2:15 am To: krnet at list.krnet.org Cc: laser147 at juno.com This thing was in unedited and unfinished form and got sent by dwarves while I was sleeping. Damn dwarves. So I'm cleaning it up just now and re-sending. Please ignore the earlier posting. Dwarves did it.
