Originally Posted by CaptTom
... but NOT on concrete, is the only answer. I used to do that....
This seems to be a hard myth to kill. Perhaps 50 years out 0f date.
From the Trogan battery site:
Storing a battery on concrete will discharge it quicker
- Long ago, when battery cases were made out of natural rubber, this was true. Now, however, battery cases are made of polypropylene or other modern materials that allow a battery to be stored anywhere. A battery's rate of discharge is affected by its construction, its age, and the ambient temperature. The main issue with storing on concrete is that if the battery leaks, the concrete will be damaged.
From Optima site:
No, today's batteries use polypropylene plastic for the case material. They will not be affected. When possible, always store a battery in a cool, dry location.