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How does a battery work?

If you ever wondered how a battery or any other question about these products work, this is your site. Here we will solve all your doubts on batteries and accumulators.

How does a battery work?

A battery stores electricity for future use . Tension develops from a chemical reaction that occurs when two different materials , such as the positive and negative plates are immersed in the electrolyte , a solution of sulfuric acid and water . In a lead-acid battery typically , the voltage is approximately 2 volts per cell , a total of 12 volts. The electricity flows from the battery as there is a circuit between the positive and negative poles . This occurs when a load that needs electricity, such as radio , connects to the battery.

Most people are not aware that a lead-acid battery works conducting a constant process of loading and unloading. When a battery is connected to a load that needs electricity , as the starter of a car , current flows from the battery . In doing so , the battery begins to discharge .

As the battery discharges , the lead plates are increasingly similar , the acid becomes weaker , and the tension decreases. Eventually , the battery is discharged as it can no longer supply power to a useful voltage .

A discharged battery can be recharged back to feed it with power . Full charge restores chemical difference between the plates and let the battery ready to provide all your energy.

This unique process of unloading and reloading of the lead-acid battery means that energy can be discharged and return again and again . The ability to undergo this process over and over again is what is known as resistance to cycles of a battery.

What should I consider when buying a battery?

How can you know which product is best for your vehicle?

Here you will find some tips that will help you make the right choice .

Refer to your vehicle handbook recommendations on OEMs for:

Size of battery – battery size that best fits the physical dimensions of your vehicle. In many vehicles can be fitted over the battery size .
Current Choke (CCA ) – The current cold start is essential to have a good start capability . Is the number of amps a battery can support for 30 seconds at a temperature of 0  F before its voltage drops to unusable levels.
Reserve Capacity – It helps to power the electrical system of your vehicle if the alternator fails. Identifies for how many minutes a battery can deliver enough energy without falling below the minimum voltage to run your vehicle.

In general, both for the current cold start to the reserve capacity , the higher this value is , the better. However, if you live in a cold climate, cold starting current is very important when choosing a battery aspect . Conversely , if you live in a warm climate , you do not need much power cold start .

If you are looking for a deep cycle battery or SUV for nautical applications, you must also consider the following:

The type of equipment to be nurtured
The amount of amps required to operate the equipment
The number of hours that the equipment used
Multiply the amps by the hours to determine the amount of amp-hours ( Ah) you will need.
Power consumption of equipment ( amps) x time (hours ) = Ah

Example : Fishing Boat
Lights 10 x 5 = 50
Electric Motor 1 x 5 = 5
Fish Finder 3 x 5 = 15
Radio 1 x 5 = 5
Total = 75 Ah *

* Look for a battery to provide the necessary amount of time for Ah and voltage specified .

To provide a safety margin , increase the number of Ah 20%

Can I do some preventive maintenance on my battery?

Should periodically review the cleaning of the battery. Keep the poles and connections free of dirt and corrosion cells. Corrosion at the poles can affect battery performance, generating a security risk.

If corrosion is found, remove the battery, unplug and remove the connectors, and remove any corrosion brushing poles and connectors with a dilute solution of sodium bicarbonate and water. Re-apply antioxidant grease before reconnecting and plug connections. Always keep an adequate record.


What the C5, C20 and C100 codes mean in lead acid batteries?

A battery of 100 Ah C100 can give 1 Amp for 100 hours until discharge.

A battery of 100 Ah C20 can give 5 amps for 20 hours until discharge.

A battery of 100 Ah C5 can give 20 Amps for 5 hours until discharge.

Although the three batteries have the same rated time , they do not act in the same way as regards their ability to load and unload …

The C100 20 Amp battery will not last long .
The C20 with 20 Amp battery will last longer than the C100 .
The C5 with 20 Amp battery will last longer than C20 .

The difference between these three types of battery is the speed that can convert stored chemical energy into electrical energy or energy stored in electrolyte , C5 is the best and most efficient , C20 is not as optimal as the C5 and C100 is less efficient.

” C ” is the total efficiency of the electrolysis and the structure of the battery is the battery capacity : 5, 20 and 100 is the number of hours it takes to drain the battery .

Why not start my car?

If the battery can not start your car, they say it is “dead ” , although this term is not technically correct . A battery is simply discharged ( the headlights have been switched on, or because they have spoiled an alternator ) can be recharged up to its full capacity. However, a battery has reached the end of its useful life can not be recharged enough to restore a level of useful energy. In that case, is really “dead” , and must be replaced.

If the battery is not dead but you can pull it from another battery puenteándola yes it is fully charged . About 30 minutes of driving should be enough for the alternator to fully charge the battery. However, if the alternator or any other part of the electrical system of your car is in bad shape , the battery will not recharge , or even a workshop mechanic can recharge. So if your battery is still downloading , check the electrical system before replacing . What may seem like a bad battery could actually be a problem in the electrical system . If any component of the electrical system in disrepair, this component also drain the new battery, and your car will fail again and again .

What can cause a failure of the battery?

Application and installation of batteries

The battery is not being used in the application for which it was designed

  • The battery is sized to the application
  • The vehicle has too many electrical accessories
  • The battery is not installed properly in the vehicle
  • The battery cables are not clean
  • The battery cables are not adjusted properly to fit the battery terminals

Service and maintenance

  • The electrical system of the vehicle has been repaired or altered
  • The vehicle has been immobilized for a long period
  • The vehicle comes from or has been circulating elsewhere in the country for a long period
  • The bearing surface of the battery has been cleaned to remove corrosion or electrolyte

Visual inspection

  • The poles show signs of having been beaten with a hammer, twisted or pushed down to within cover
  • The side poles show signs of past thread
  • The container or cover signs of mechanical stress , damage or high temperatures.
  • The ends of the battery project outwardly , thus indicating an increase of the plates

How is a vehicle starts with a bridge?


These instructions are designed to minimize the risk of explosion. Keep the battery at all times away from sparks, flames and cigarettes.

  • Both batteries must have the same voltage (6 V, 12 V , etc. . ) .
  • When bypass a battery , always wear safety goggles , and never lean over the battery.
  • Do not bridge a bad battery , before connecting the cables , inspect both batteries.
  • Ensure that vent caps are tight and level.
  • Ensure that vehicles are not touching , and that the two power contacts are in the off position.
  • Turn off all electrical appliances (radio, fan, wipers , lights, etc. . )

The steps below should be followed exactly.

  • Connect the positive (+) cable to the positive (+) terminal of the discharged battery .
  • Connect the other end of the positive (+) cable to the positive ( +) battery of the wizard .
  • Connect the negative (-) cable to the negative ( -) battery of assistant .
  • Finally connect the negative (-) cable to the engine block of the disabled vehicle , away from the battery and the carburetor.
  • Make sure the wires are not in contact with the fan blades , belts or other moving engine parts .
  • Start vehicle and remove cables in REVERSE as to connect.
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