When replacing a car battery do you connect the positive or negative first,battery for commercial truck gps,replace battery apple mouse - How to DIY

12.05.2015
Following car battery repair guide will give you all the information you need to determine whether you can repair the battery or you need to replace it.
Check the electrolyte levels in a car battery, you can remove the battery caps on each of the electrolyte cells themselves.
Use a multimeter with both leads connected to the corresponding terminals on the battery to determine the battery’s output. Connect each end of the positive jumper cable to the positive terminals on each car battery. Connect one end of the negative jumper cable to the negative terminal on the functional, charged battery.
Attach the other end of the negative jumper cable to a grounded metal component of the car that contains the dead battery. Allow at least 5 minutes to pass after starting the engine of the car with the charged battery. If the engine in the car with the dead battery fails to start, allow 5 more minutes to pass for the dead battery to charge. Remove the jumper cables from each car after the engine has started in the reverse order in which you connected them. Allow the car which had the dead battery to continue running for at least another 5 minutes. Cold weather is known to slow down the chemical reactions that generate electricity in batteries. Hot weather can trigger problems in old batteries, especially if the air conditioner is suddenly being used continuously and many short trips are made throughout the day.
Battery electrolyte contains sulphuric acid that can cause damage to eyes, skin or clothes if spilt or splashed. Make sure there are no short circuits or continuous drains of current (such as an alarm or immobiliser) over long periods without the battery being charged. Periodically ensure the battery is fully charged by measuring the specific gravity of the electrolyte. Make final connection on engine block of stalled car – as far away as possible from battery.
Your instrument panel battery light indicates battery discharge for extended periods after the engine is running. Any of these warning signals may also indicate a problem with the electrical system in your vehicle and not necessarily a battery failure. If you get acid on your skin or in your eyes, flush with water immediately and seek medical attention.
Any unused battery, regardless of the type, will self-discharge over time and if allowed to remain discharged, could suffer battery failure. If the battery starts the vehicle once the vehicle has been started recently, test your battery to determine its state of charge.


A leisure battery is designed to provide a steady amount of current over a long period of time. The purpose of a leisure battery is to provide power for trolling motors, uninterrupted power supplies (UPS) and other accessories for marine, recreational vehicle (RV), commercial and stationary applications.
Overcharging is usually accompanied by heavy gassing (beware of the risk of explosion) that will accelerate the shedding of the active material from the positive plates. Overcharging is also usually accompanied by high electrolyte temperatures resulting in rapid deterioration of the plates and separators. I bought a new battery for my 2007 Hyundai Elantra last week and noticed today that the clamp is too loose on the positive terminal even when the nuts are tightened as much as possible. Is there a special clamp I need to get so that it will work with the cable I have and the battery? If you remove the screw and clamping bar from your original terminal, you can use a hack saw to widen the gap in the terminal. To submit this form you need to use Internet Explorer v10+ or recent version of Chrome, Firefox or Safari. Positive terminals will be indicated by the plus symbol, and negative terminals will be indicated by a minus symbol.
You can attach the ground cable to the frame, chassis, or other component that is reasonably clean and free of paint or oxidation. Upon starting the engine, its charging system will begin to charge the dead car battery through the jumper cables. This will allow the dead battery to build up a charge of its own, although it would take longer to fully charge the battery. If the jumper cables and the battery you are charging have enough power, the car engine should turn over easily and start.
When do car batteries fail?Currently there is no precise way to predict exactly when a battery will fail. Modern vehicles with small grille areas often have high under-bonnet temperatures, which can also lead to battery problems.
What are key hazards when handling a battery?When being charged, or even when not in use, batteries may contain hydrogen gas and air in an explosive mixture.
How do I jump-start a car with jumper cables?Always try to avoid using jumper cables unless absolutely necessary.
If vehicle has not started in 15 seconds, stop procedure and check ignition and fuel systems. How long can I leave my battery unused?Lack of use is one of the biggest causes of battery failure – especially in automotive batteries that are designed to be charged regularly by an alternator.
Why does my battery start my car sometimes but not other times?This is probably not a battery problem. Also make sure that the alternator is adequately charging and that all the connections are good.


What is overcharging?Overcharging is charging beyond the time necessary to fully charge the battery or charging a battery at an excessive rate in amps. Overcharging may cause buckling of the plates leading to perforation of the separators and internal short circuits.
I bought a universal clamp from an auto store, but the new clamp is too small to fit around the positive terminal.
After you open it up slightly by cutting the gap with the saw, reinstall the clamping bar and screw. For example, connect one end of the positive jumper cable to the dead battery, then connect the other positive end of the jumper cable to the charged battery. The increased use of headlights, heaters, demisters, windscreen wipers and so on can also increase the load on a battery, lowering the amount of charge available from the alternator to the battery. This gas can be ignited by naked flames from matches, cigarette lighters, sparks from short circuits caused by spanners or incorrectly connected jumper leads.
If you suspect that your battery is failing, have it tested or replaced as soon as possible at your local Battery Centre.
If the problem occurs only after the vehicle is not used overnight or for a day or more before starting, then the problem is often a low state of charge.
Leisure batteries are also designed to be discharged over and over again (something that would ruin a car battery very quickly). It results in corrosion of the positive grids and damage to the positive active material in the battery therefore reducing the battery’s ability to carry the starting current. Also, this is what the original clamp looked like, and the cable has two metal pieces at the end that were screwed into it. Always disconnect the earth lead first and replace it last when removing or replacing batteries. Baking soda and water may be used to neutralise electrolyte and in inaccessible spaces on a vehicle. To accomplish this leisure batteries sometimes use thicker plates and glass mat separators are added to increase the life of the positive plates. The universal clamps in the store though all looked like the cable should only have one end to it, like this. If these measurements are off, there is nothing you can do to repair the battery and it should to be replaced. To provide a large amount of starting, a car battery uses thin plates in order to increase the plate surface area.



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