On Saturday, 31 May 2014 16:33:58 UTC+1, waremark wrote:
On Saturday, 31 May 2014 04:44:57 UTC+1, wrote:

My 9.6 Ah Lithium Iron Phosphate battery is amazing in its ability to hold full voltage for hours.



My 12 Ah sealed lead acid battery keeps slowly dropping voltage, especially if it gets cold.



Since my glider has a purpose built holder for the size of the 12Ah lead acid battery, are there any Lithium Iron Phosphate batteries built in the size of the 12Ah lead acid cases?



http://www.accu-24.de/de/LiFePO4-Akk...h-151x65x94-mm



This model is the exact same size as the lead acids which most gliders come with. I have just bought two with the fused top for my Arcus from this website - this is the version I bought:



http://www.accu-24.de/de/LiFePO4-Akk...sg.-MPX-mittig

These batteries have been a plug and play swap for the original equipment lead acid ones. They are working fine with my Strobl solar panels and with the original battery chargers, and since I have had them, in flights up to five hours I have not had to switch from one battery to the second. (I have two very power hungry panels, with LX9000 displays and much else).