New Batteries

[norty1]

I left my rig on my dealers lot for a little over a month and failed to disconnect the 4 year old batteries. They were completely discharged and would not charge back up.

Today, I replaced them both and installed a Battery disconnect switch so next time I leave it unattended, it will be easier to prevent.

[clubhouse]

Currently I don't have a battery disconnect, I pull the batteries and keep them on battery tender in my garage.

However all you folks using a battery disconnect has me thinking.

If I was to install one, how long can I leave fully charged, but disconnected, batteries on the a-frame without worrying about them discharging to a point where I am causing damage to the cells?

[norty1]

I can't say. My rig was 4 years old and had never been left without power. I think the condition of the batteries will have a big effect.
I am sure the age of mine was a factor.

[Ela1948]

Originally Posted by clubhouse

Currently I don't have a battery disconnect, I pull the batteries and keep them on battery tender in my garage.

However all you folks using a battery disconnect has me thinking.

If I was to install one, how long can I leave fully charged, but disconnected, batteries on the a-frame without worrying about them discharging to a point where I am causing damage to the cells?

If fully charged you should be able to go 3 months assuming that there is no parasitic draw. As the batteries age that probably would decrease in time. Temperature also plays a part. If the temperatures are extremely cold, I would want to top the batteries off more often.