I use two 12v sealed batteries paralled together. One is an old battery (7A-h) from my NBN unit, the other is a cheapo 7A-h one from Jaycar - ie total 14 A-h. Stickey taped together and as long as I charge them after each night, they seem to be ok. Don't kbow if they will be man enough though when I start long imaging sessions. I will probably then just get a small car battery from the service station. No big deal really. What is all this talk about an inverter? My observatory is at bottom of garden - no mains power down there.....
