is concrete rock bad for batteries?

Question

i've heard that sitting your cell phones on the ground is damaging to the battery.
Perhaps something in the rock depleting the charge rate..???

Answer 1

No thats an old wifes tale

Answer 2

I've heard all my life from backyard mechanics that you shouldn't place car batteries on concrete or ground cuz it would make them lose their charge quicker. However, since my childhood I have learned several things; (1) adults aren't always right, (2) earned a degree in Chemical Engineering (so I know WHY it has approx 2 volts per cell etc) and (3) you don't learn if you don't question.
There is no reason why any battery would discharge at a faster rate simply because you lay it on the ground, of course, the exception to this is if the hot terminal contacts ground the battery will discharge but not slowly... very rapidly with generation of much heat.
But all cell phones I've ever seen have the battery contacts internal to the device, thereby rendering the aforementioned feat impossible. There is a slight possibility that if the recharging circuit terminals are grounded some leakage could occur but this would be due to an incredible oversight by the circuit designers. Not to place diodes within the circuit to prevent this from happening. So.... if you have a decent phone, laptop, whatever.... feel free to lay it on the ground next to you... etc. But not while swimming. Don't go Ben Franklin on me. It's a wonder he didn't die with that kite and key deal.

Answer 3

I don't know about cell phones,but a standard car battery which we took out to work on the motor was sat on the cement door ,and 3 days later when we got ready to put it back in ,it was dead.

Answer 4

It's an old wives tale from people leaving car batteries on the garage floor until they die, and then blaming the concrete.

Answer 5

if the rock is magnetic it cold affect the battery. The good news is that most rocks are not! Sedimentary rocks shouldn't have a magnetic field... So there is no problem if you are not in an area full of volcano's and/or between two tectonic plates.

Answer 6

It's a myth; there is no effect.