What liquid can you add to a flat car battery to get an instant charge?
970116
The only way that could work was if the battery was not working due to lack of water.  Adding water won't help without charging the battery but if it was barely low enough it might help spread out the electrolytes allowing the car to start.
282560
put an electric charge on each end, it needs to be a very strong charge though
1112995
You need to hook enough solar panels in series to give a voltage slightly higher than that delivered by the car batteries.   I'll assume that they're 12 volt batteries.   Connect the panels in series until the output is about 12.5 volts.   Connect the ends to the terminals of your battery, checking that the polarity is correct.   When the batteries are partly charged, they'll easily deliver 120 VA for short periods, but unless you've got a very large array of solar panels, you won't get anything like this amount of power from the panels alone when the batteries are flat.   Car batteries are designed to deliver well over 1000VA to the starter motor.   I live in the S of NZ.   Not far from here there's a hut on a sheep station with a system like this that delivers power to a 12 volt lighting system.We probably get much less sunshine than you do in your climate, but last I heard, the system works fine.
788768
Just the usual stuff.  Use an electrolyte (H2SO4/HNO3), a couple of electrodes, a reduction table of half cell potentials, and some electricity.
342190
If you can get your hands on a solution of silver nitrate, it should be pretty easy.\n\nYou'll need a battery (9 volt should do it) and two lengths of wire.  Run one wire from the positive terminal of the battery and attach it to a silver electrode (available in science shops) or any piece of silver.  If you can't get the silver electrode, just use the copper wire.  This will plate some of the copper onto the ring, though.  Attach the other wire to the ring and to the negative battery terminal.  Lower the ring and the silver electrode into the silver nitrate solution (without letting them touch) and wait.\n\nThe positive silver ions in the solution will be attracted to the negative ring and should plate the ring nicely.
464475
Don't try this one yourself! Use a pet rat or something!\n...\nActually, don't! Or i'll get hunted by Animal Rights Activists!!\n\nAll you need is a battery, two wires and a large capacitor.\nCharge the capacitor by connecting the battery across it with the two wires.\nThen disconnect the wires.\nThe capacitor has now been charged - if you put your hands across the terminals, you'll get a nasty shock.
915674
place it into your regular car, then drive fast
48651
You can show that a tomatoe, orange, or other acidic fruit can be used as a battery.  If you have one of those things that you use to measure ellectricity in a battery, I think you just jab two peices of metal into the fruit and attatch them to the device and it will show electrical current.
928606
A portable cell-phone charger. U may use solar energy.
654418
How about a friggin car you can run on food waste?  I'm tired of paying rich bastards who play price fixing games making money off me.  Ethanol or Methanol sound like a better alternative if we can all start making our own fuel without blowing up a few city blocks.\n\nSaw a news bit about a water-fueled motor the other day...\n\nJust read that answer above.  170 miles on a cell?!?  Are you freakin' kidding me?!?  My 113hp/69ft. lb motorcycle with a 4.5 gal tank does over 200 miles!  AND, it does wheelies!
519609
They use methanol.  Probably about 100 gallons or so per car.
165072
It already has.  For example, Altair (stock symbol ALTI) now makes nanotech Lithium Titinate battery electrode materials that make smaller more powerful batteries that can be rapidly charged and discharged without explosions and at a wider range of operating temperatures.  The battery life is also long eneough that if used in a say a golf cart for example, when the cart wears out you can reuse the same battery in the new cart.
55953
Make a battery from a lemon!\n\nhttp://www.energyquest.ca.gov/projects/lemon.html
1070563
For a car?\nif you mean accelerate, go with gasoline\nSupercharged, turbocharged are nice for getting more power
942396
Because I'll bet you let it sit all summer without ever using it or charging it, right?\n\nLead-acid batteries have to be regularly discharged and recharged to retain their ability to work.  If you go two or three months just letting a battery sit, it's done for.\n\nAfter you buy your new one this year, and when the season is over, here's what you need to do:  every two weeks (at LEAST), fire up the snowmobile and run it for a while.  Then put the battery on an automated trickle-charger -- if you get one that has a "maintenance mode," so much the better, you can just leave it on all the time, and the charger will maintain the battery for you.\nIf you do the above, your battery will be ready to go the next winter, and will last at least 4-5 years, probably more.
704252
Just use four 12v car batteries in series = 48v, you can always hook them up to some renewable or rechargable source.
631579
2 electrodes and a battery