Car battery shelf life?

[Mike_and_Tina]

I bought a new car battery a few weeks back and now I won't be using it
for some time. I had heard not to let them sit on the ground or on concrete
because it will slowly drain the charge. So it is sitting on my wooden work
bench. My question is : How long will the battery remain good in this
condition? Will it slowly die if not used?

Mike

[John_in_Houston]

Originally Posted by Mike_and_Tina

I bought a new car battery a few weeks back and now I won't be using it
for some time. I had heard not to let them sit on the ground or on concrete
because it will slowly drain the charge. So it is sitting on my wooden work
bench. My question is : How long will the battery remain good in this
condition? Will it slowly die if not used?

Mike

I found the following information by typing "Car battery storage" into Yahoo:

Tip: If you are going to have a battery in storage for months at a time in a car, disconnect it from the car, it will reduce the discharge. Or, periodically charge the battery, maybe once every 2 to 4 weeks. If you have it in storage disconnected from the car, a charge every month or two will help keep the self discharge from draining the battery. You may also look for regulated trickle chargers that are designed for this type of application. Thanks to a former auto company engineer for this tip

The marina I worked at would store batteries from boats both deep cycle and cranking over winter with no trickle charge in an unheated room. Come spring we would charge and reinstall. If you let it sit several months the charge will "drain" but if it is a new or good battery and full of electrolyte it will recharge no problem. You can leave a battery on trickle charge (2 amps) this way it will remain ready to go but otherwise just let it sit.

[QUOTE=Unregistered]The marina I worked at would store batteries from

Oh yeah I forgot you are right in keeping it off the ground. Keep it on wood or rubber and keep the surface of the battery clean. They can/will discharge slowly if the battery case is grounded or surface discharge can occur between terminals if a build-up is allowed to form.

[texican]

You are correct about the battery slowly discharging if you set it on concrete or on the ground. It will also slowly discharge if you place it on glass, wood, steel, plastic or suspend it in space with some sort of gravity field.

Fact is, it will slowly discharge, no matter what you do, if you don't keep some sort of charging apparatus connected.

I lived off grid in my house for 12 years, and my battery bank was precious to me. Take care of them, and they'd take care of you. Abuse them, and they will die a little, never regaining that amount of capacity. I travelled to AK for 5 or 6 months most of those years, and for safety, would disconnect the battery bank via a master manual disconnect breaker. I'd overcharge them for several days before hightailing it to AK, and when I returned the voltage would be in the low 12's. Fully charged is 12.7vdc.

Now they will discharge "faster" if they're in contact with the ground and have continuous moisture, but still should last quite a while.

[rambler]

Whatever you do, the battery will slowly discharge. Every month or 2, you should slowly recharge it back to a full charge. You can find a simple trickle charger for not many dollars, or a good 2/10/30 amp charger for a few bucks more.

Do not let it freeze while it is low on charge - it will wreck itself.

Batteries last 2-7 years on average, depending how much deep cycling and vibration it gets. The clock is ticking now that you own it.

---Paul

[Shrek]

I stored batteries two ways. Charged batteries were stored on rubber in a ventilated area with a $12 J.C. Whitney solar trickle charger on them. Un charged batteries were flushed and dried then dry stored with a container of eltrolyte to be added prior to charging and use.

Originally Posted by Mike_and_Tina

I bought a new car battery a few weeks back and now I won't be using it for some time. I had heard not to let them sit on the ground or on concrete because it will slowly drain the charge. So it is sitting on my wooden workbench. My question is : How long will the battery remain good in this condition? Will it slowly die if not used?

Mike

http://www.batteryfaq.org/carfaq.htm