We’ve all heard the storing batteries on concrete myth before. Some of us refuse to store a car or boat battery on concrete because our mechanic or trusted friend said it will drain the battery. Turns out this myth had some truth in it but is no longer relevant with today’s battery construction.
Early Batteries were constructed from wooden crates holding glass encased cells. When the wood was subject to moisture or temperature changes it would warp and break the glass cells causing the acid to leak out and the battery to fail. You would have definitely wanted to keep one of these batteries off of the floor and in a cool dry place.
Next Generation Batteries
The next generation of batteries were Nickle-Iron batteries that were encased in steel and covered with a rubber coating. These batteries were susceptible to discharge when placed on the ground due to the rubber coating breaking down, absorbing moisture from the ground and allowing current to flow through the pores of the rubber membrane. These batteries were not meant to be stored on the concrete or on the ground.
Current Day Batteries
Batteries made today are contained in a hard plastic case that is impervious to moisture and actually will benefit from the relatively stable temperature of a concrete floor. New batteries can be damaged by extreme temperature changes and should be kept in a relatively cool environment when storing them.
What Damages Modern Batteries
- Dirt and dust can become carbonized, creating electrical conduction which drains the battery. Combat this by using a clean rag to clean wipe off the tops of the battery.
- Self-discharge occurs over time with lead-acid batteries. Reactions within the plates happen as the battery ages creating a leak. The warmer the air surrounding the battery the faster the rate of discharge. Keeping the air around stored batteries cool will help slow the rate of self-discharge.
- While cold temperatures are rarely the cause of battery malfunctions, a battery that is at a low state of charged and exposed to freezing temperatures can freeze causing the case to crack. Keeping your battery fully charged during the winter months is an easy way to prevent this from happening.
- Knowing the shelf life of your battery can help a lot as well. A car battery stored in a cool and dry place can last a few years if you keep it topped off with a trickle charger.
Today’s batteries are well insulated and no longer take on water that can cause discharging or leaking. That being said, there are clearly right ways and wrong ways when it comes to battery storage. Keeping your batteries clean, dry and understanding their shelf life can make a big difference in preserving their longevity and the quality of their performance. So go ahead and leave that battery on the cool dry floor of your garage. Kinda great, right?