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If the keys shorted the two terminals [Positive and Negative], then it is very likely that the short discharged the battery, and it will either be "dead," or very weak. On the other hand, if the keys, or metallic coins, did not short the battery terminals, then the battery should still have its charge and thus will work.
It is necessary to warn people that the carrying of any battery [but more critical if batteries are 9 volts or more] in pockets is VERY DANGEROUS.
If the battery terminals are shorted, heavy current will flow, and the battery will get very hot.
That overheating will result in thermal or chemical burns to your skin, and in a worst case senerio, cause the battery to EXPLODE.
Do not carry batteries in your pockets unless the terminals are properly capped to prevent shorting. Most new 9 volt batteries when sold are provided with a plastic safety cap on the terminals.
I recommed saving a few of those caps to reuse when any battery is not installed in a device. Even in a drawer or on the workbench, a battery's terminals can be shorted resulting in overheating, leaking electrolyte, fire, or explosion.
When discarding 9 volt or larger batteries you should protect the terminals from shorting [caps or Electrician's tape] to prevent the possibility of starting a fire in your wastebasket or trash container.
What else can I help you with?
What could be wrong New battery but battery light still on?
There could be a sensor wire that is bad or going bad
If the battery is going out will the alternator still power the car?
the battery job is to start the car so the alternator will kick in after the car is running
What happens if you unplug your battery and still doesn't start 2001 Monte Carlo?
If you unplug the battery is for sure is not going to start. What are you asking?
Can you still buy pocket watches?
Yes, there are still pocket watches available on the market.
When I shut my truck off the radio stays on?
The battery is still going until you open a door.
Why won't 1996 Jeep Grand Cherokee turn over after being in the store for 5 minutes?
It is going to be one of a few things. First thing to check is the battery terminals. Look for loose or corroded terminals at the battery. If after cleaning them with a wire battery terminal cleaner brush, and tightening them it still will not start, have the battery checked to see if it is good. If the battery is good, then have the starter checked.
Why is a car battery being drained in an 1985 Fiero. A rebuilt alternator has just been installed but the battery is still contueing to be drained?
dead cell in the battery or something is on that is pulling power from the battery.
Do they sell replacement batteries for the razor pocket rocket?
Yes, you can buy a replacement battery for your Razor pocket rocket. You can usually order these batteries directly from Razor's website or you can find it in dealers and shops online such as Amazon and eBay which offer replacement batteries for different models of Razor pocket rockets. It also depends if the company still makes the model and parts of your Razor pocket rocket.
How can a pocket in a pair of trousers be empty and still have something in it?
This is a riddle. The answer to the riddle is that the pocket has a hole in it.
Why is there still a pocket for a pocket watch on jeans?
I keep my wrist watch in there after removing the strap.
Did neanderthals and humans interbreed?
that is still being debated, but the majority are going with "no"
When you drive your 2000 elantra you notice that smoke comes out of the battery top vent you changed the battery and this is still going on does anyone know what could be the problem?
The alternator is probably over-charging the battery. Replace the alternator if the voltage at the battery terminals is over 15V when the engine is running.
