Connect the positive clip of the battery charger to the positive terminal on the battery. Connect the negative clip of the battery charger to the negative terminal on the battery. Select the charge rate you desire either 2,4, or 6 amp. The newer battery chargers will let you know when it is fully charged.
Connect the positive clip of the charger onto the positive post of the dead battery. If the battery is located inside of a vehicle, connect the positive charger clip to a grounded surface--like an engine block--on the vehicle.
A typical car battery charger will plug into a wall outlet. The end that connects to the battery itself generally has aligator clips on two different leads. The black one is your ground or negative, the red is your positive. Attach each clip to its corrisponfing battery post. Follow the directions for your specific charger to ensure your charge the battery properly.
apparently on the bonnet release catch under the bonnet, there are two bolts sticking out and you are apparently meant to clip battery charger to those but i am not sure which way around they go.
it operates a battery,mostly a 9 volt battery
red wire or clamp to positive (+) post of batteryblack wire or clamp to negative (-) post of batteryset charger to 12 volts (if more than one setting available)plug charger into wall socketlet charge for 12 hoursThere is a danger of exploding the hydrogen and oxygen gases that are given off from a fully charged battery, so remember Don't Smoke whilst doing the above!Also, it not safe or in any way good practice just to put both of the charger cables directly onto the battery terminals.This is the safe way to do it: first clip the +ve cable onto the +ve battery terminal. Then clip the -ve cable to a good "Ground" point somewhere on the vehicle's bodywork, at least a yard or a metre away from the battery.When you want to remove the cable, do this: first unclip the -ve cable from the "Ground" point; only then unclip the +ve cable from the +ve battery terminal.Doing it all that way helps to avoid sparks over the battery's air vents when you attach or detach the +ve cable from the battery.Always remember: NO SMOKING!Always for safety sake!!!!! Wear safety googles and cover exposed skin before putting any battery on a charger, with that being said be sure to put the positive(red or larger terminal) on first, then clip on the negative(black or smaller terminal) last, also to avoid sparks and possible explosion of the battery acid in your face etc. be sure the battery charger is not powered up before you hook it to the battery, in other words keep the charger unplugged before you clip up to the battery in question being charged.Also: Try to be charging in a well ventilated area to help avoid the possibility of explosive fumes meeting up with unexpected sparks Work smart, work safely!!!More detailsEach type of battery charger is different, they are not all the same. Each unit should come with a set of instructions specific to that model and also some important safety precautions.First check fluid level in battery. Then with charger turned off, connect positive cable, (the red one) to the positive side of the battery. Then connect negative charger cable (the black one) to the negative, (ground) side of the battery. then select how many amps on charger u want to charge at. the lower the charging amps, the slower the battery will charge,but the slower the better, if you have the time. for eg charge at 2 amps and leave all night while charging, remove caps from battery, also you do not need to remove battery from car, but make sure ignition is off and key removed, when battery is charged remove cables black one first then red one.Read the instructions that came with the battery charger to make sure you know how your specific battery charger works.Connect the battery charger to the battery. If the battery is connected to the car, attach the positive (usually red) charging cable to the positive post (usually marked with a plus sign). Then attach the negative (usually black) charging cable to theengine block. Do not connect the negative cable to the negative post while the battery is in the car. If the battery is not connected to the car, attach the positive charging cable to the positive post. Then attach the negative charging cable to the negative post, usually marked with a minus sign.Volt/Amp Selector on control panelTurn the "Volt/Amp Selector" to the appropriate type of battery and amps, and make sure that the correct "Volt" switch is selected for the size of battery.Plug the battery charger into an appropriate outlet. If the cord has a ground, plug it into a grounded outlet. Do not alter the cord in any way.Use the ammeter to measure battery-charging rate.Turn the "Charge Time" to set how long you want to charge the battery. Use the ammeter to measure battery-charging rate. Use the battery test monitor to see if the battery is in working condition.Turn the battery charger off. Unplug the battery charger from the outlet. Turn the "Selector" and the "Charge Time" to "Off."Remove the negative battery charging cable first, then remove the positive charging cable.
The brightness of the bulb would decrease as the alligator clip moved along the pencil lead. This is because the resistance in the circuit would increase as the clip moves farther from the battery source, resulting in less current flow and therefore less brightness in the bulb.
If the alligator clip from the test light is attached to the negative post of the battery it will light up whenever the probe end touches a positively charged circuit and likewise if the alligator clip is attached to the positive terminal of the battery the test light will light up when the probe end touches a negatively charged circuit
solid qe
Do the following in this order: clip the positive end of some jumper cables to the positive terminal of the good car battery (positive is usually red). Then, clip the positive end of the jumper cables to the positive end of the bad car battery. Now connect the negative end of jumper cables to the negative terminal of the good car battery and then connect the other negative end to THE BLOCK of the car with the dead battery. Do not attach it to the battery! Any metal place on the engine mount itself will do. To take it off, do everything in reverse order. The above answer can be done, but is not recommended. The recommended practice is to remove the battery and put it on a trickle charger. You can damage the alternator by blowing the diodes on the car with the good battery if you do what's stated above. Another thing is, you have to watch the age of the battery you are trying to charge; anything older than a year requires a battery fluid check, if possible. If the fluid is at a good level, put it on the charger. If it is low or dry, fill it with distilled water, wait for about and hour then put it on charger. I've linked a good point of reference below from a top automotive battery manufacturer.
To charge two 12 volt batteries in series you'd need a 24 volt charger. That's the pat answer. You need to overcome the total voltage of the series batteries (12 V + 12 V = 24 V) to drive electrons "back into" the batteries to restore the charge. It may work better to use a 12 volt charger and just disconnect the link between the batteries and charge them in parallel, but the setup may not support separating the batteries that way. You do have the option of charging them one at a time without disconnecting anything using that 12 volt charger we mentioned. Clip the charger across one battery, charge it up, then repeat with the other battery. The two basic choices are getting an appropriate 24 volt charger or doing a bit of disconnecting and reconnecting so that the batteries can be charged in parallel with a 12 volt charger, which is a much more commonly available and less expensive charger. That's excellent advice from Quirkeyquantummechanic and well said I might add. I'm in Australia and use 2X12 volt batteries to run my 24 volt Motorguide Trolling motor. You can make disconnecting or reconnecting a lot easier when charging your 2x12volt batteries, needed to be run in series to produce 24 volts, by connecting an Anderson plug to suit. Connect the Anderson plug in a handy position into the short lead that goes from the positive post of battery1 - to the negative post of battery 2 - I.E. the lead that enables the batteries to run in series. Then simply add an isolator switch and turn the two batteries off before charging each one singularly with your 12 volt charger. Regards.
My 2005 SLK350 has a +ve connector under the bonnet. Its under a red plastic enclosure and has a hinged cover on it. Just access this connector and clip on your charger. You shouldn't need to access the battery.