LX 90 Power
Posted 07 May 2013 - 12:32 PM
Posted 07 May 2013 - 01:43 PM
I usually observe mostly from my backyard and the best spot (with least obstruction from trees) is over fifty feet from the back door where the nearest AC outlet is located. So, I prefer to use a old 12 volt lead acid mower battery. With a 20 amp hour capacity, it will last more than enough time, since I only spent an hour or two at a time. It's easy to recharge, has a built in carrying handle and weighs maybe 10 pounds.
Posted 07 May 2013 - 03:36 PM
Posted 07 May 2013 - 03:46 PM
Posted 08 May 2013 - 06:53 AM
Remote astronomy sites tend not to have very clean power.
Posted 08 May 2013 - 05:48 PM
most have handles...most are gel filled and sealed and most are about the size of a lawn mower battery...
These can be found for FREE as most users replace their batteries every year because they do not want to get stranded at the shopping mall...
Posted 13 May 2013 - 06:57 PM
12 volt sealed lead acid or gel batteries are the way to go. I use a dedicated 7 amp hour battery to run my scope, and extra batteries including larger capacity models to run the dew heaters. The 7AH battery gets me through at least three nights before I worry about its charge level.
One thing I do is install a 3A fuse on it. 3A is not a lot, and I do that on purpose. My LX200 has a lot of torque which is capable of damaging cords and attachments during slewing if they get stuck. While I try to be very careful, having a fuse that blows before damage occurs covers any oversight that I make.