They don't. That is an old myth. The only kernel of truth comes from the floor usually being colder and a cold battery will have less power. If concrete allows electricity to "leak" out of the battery, then the battery sitting on a metal tray in most cars,trucks, and part stores would kill every battery out there.
yes
No they lose some of its power over time. it depends on the type of the battery. rechargeable lose more of there charge that normal battery's.
small battery can lose charge fast,and big batteries can loose charge at large time
Dead cell in the battery or something is on pulling power from the battery. Light or relay.
We know that AA batteries (or any others) lose charge because energy is taken out of them with use. The chemical reactions that generate the voltage occur, and this "uses up" the energy in the cell. This is the long and short of why batteries lose charge, and you can see it if you think it through. We can also see a situation where a cell loses charge when stored. No materials are perfect insulators. And lengthy storage, or storage under improper or poor circumstances will set up conditions under which leakage current could discharge a cell. Plain and simple.
Lithium ion batteries are supposed to last longer than nickel batteries. They do not lose charge for up to 10 years in their packaging, and they last longer while in use as well.
Yes, batteries lose energy. If you leave something on that has a battery in it, then the battery will lose it's energy and you must throw it away.
Rechargeable batteries lose their effectiveness over time. You could try discharging the battery completely and then recharging. However it is likely you may need a new battery.
By using them to much.
No not really. But it depends on the type of battery you are using. Basically the only battery that you can get more use out of if you put it in the refrigerator is NiMH and Nicad batteries, (mostly used for electronics) because those kinds of batteries lose their charge after a few days. So if you keep them in the fridge they will retain 90% charge for months. But other then that, putting batteries in the freezer or fridge is not recommended. Also, if you put batteries in the fridge, when you take them out you have to wait until the warm up a bit before you use them.
It is wise to let batteries - whether in a cell phone or laptop - to run all the way down from time to time. Continuously charging your phone or computer can cause batteries to swell and lose their ability to hold a charge for long periods of time.
It sounds like your batteries won't hold their charge and need replacing, but before you do that, discharge them completely , for example by putting them in a torch with a bulb and then leaving it on until they are flat. (I am assuming you are using AA batteries). Then recharge them and see if it is any better. If not, get new ones - I would suggest you buy "Eneloop" brand AA batteries as they are very low-discharge : standard NMH rechargeables batteries lose their charge in a month when they are not even in the camera, unless you keep them in a cool place such as in the butter compartment in the refrigerator. Try it out.