Currently in Lincoln, NE it is -5 F outside. My car has a battery in it that has 350 cold crank amps. Not nearly enough to even think about starting my car. Is it safe for me to leave my battery charger on the battery over night (hoping it will start up by 7:30a)? I already have plans to put in a new, better battery with butt tons of cold crank amps.|||You can charge your battery overnight just as long as the place where it is being charged is ventilated, and make sure you loosen the vent caps on the battery to allows gases to escape.|||Just bringing the battery indoors will help it no end, that's probably the most helpful thing you could do. and a trickle charger will top it up overnight. It may be messy and inconvenient, but that's nothing compared with the hassle if it dies suddenly as batteries can do in freezing conditions.
Don't forget, if you do so, that charging batteries give off gas so keep it in an "unpopulated" area and don't smoke over it.|||Not sure on your car but on my Mercedes if you leave the leads connected whilst charging a flat battery the surge in voltage generates fault codes through the ECU which have to be re-set using the STAR diagnostic system. At about 拢50 a time it can be far cheaper to disconnect, just make sure you have the radio/cd code before you do (UK-US ?).|||if the battery is too weak for the car, why the hell is it in there? get the proper battery. as for a charger on overnight, NO! unless its a very minimal trickle charge or a good charger with an automatic shutoff. if youre constantly pumping juice into the battery, youre risking an explosion.|||Depends on the type of charger you have - some have an automatic shutoff feature that turns the charger off when the battery reaches full charge; most are a manual unit where you must turn off the charger or risk ruining / explosion of the battery|||the wore thing that you can do is boule the water out of your battier if its not a trickly charger if it is than put it on will help keep the bat woarm and prolong the crank you need most with cold starts|||Yes.
The comment about only a fool leaves the battery connected while charging it? Do you dis-connect the battery while driving? Do you remove the filler caps while driving? Of course you don't.
Please think before posting.|||A 2 amp charger will keep your battery up overnight in cold weather. It's MINUS 22 F degrees here and I keep my battery up with an automatic 2 AMP unit and my battery is over 5 years old.|||It will keep on charging until the back emf equals the input emf|||YES JUST BE CAREFUL OF THE FLUID IN IT GOOD LUCK.|||I presume the battery and charger are in the house so what is the problem take tops off and leave to overnight charge
only a fool would try to charge whilst still connected to the car outside
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