Cadillac SRX Second Generation Forum - 2010+ Discussion, Maintain power system in Cadillac SRX Forums; How to keep your battery or power system in good condition during your vacation if you want to keep your ...
I would not disconnect the battery unless necessary. I am not real familiar with systems that would be effected, but I am sure you would have some resets when you reconnected. I do not think 40 days is long enough to be a problem. However, if you are concerned get, as suggested, a trickle charger.
Automobile(s): 14 ATS AWD 3.6L Performance - Son of a Gun Grey Metallic
Re: Maintain power system
Don't worry about disconnecting the battery, but the SRX has five positive terminals that need to be released (if memory serves me correctly) in order to release the main positive (or four and one... whatever, lots).
I believe, if you have to disconnect, always disconnect negative (ground) first, then positive (hot). When reconnecting, reconnect hot, then ground. For one, ground is further from the battery (less gasses) and second, its supposed to reduce the chances of a surge/spark when connecting. If you gotta disconnect, disconnect the ground and leave it at that...
Trickle Charger is a great investment for prolonging batteries on vehicles which are not frequently used. I use one on my Indian Motorcycle and my John Deere Tractor, they always start due to the float charging maintianing the battery in a fully charged condition. A Deltran Battery Tender Jr. for under $25 will work perfectly. They come with a small cable that attaches to battery posts at terminal connections and the other end has a plug. When ever you need to use it just plug in the tender to a 110V outlet and connect its cable to the one on the vehicle very simple.