The batteries are the power source for each device that uses a battery, which is needed to power the devices, The batteries are a units that can store electricity in a safe manner until they are used without being restricted to the required time and without restricting to the power connecting of the device.
The idea of batteries is being a source of alternative energy as they have the ability to store energy and use it later, but the batteries are different from the energy that used in homes and facilities because atteries are a constant source of the stream, unlike all electrical devices which operate on AC.
How is the battery charging process?
1. rechargeable batteries are a good option instead of the other batteries which become a source of pollution in the environment.
This is called the type of battery as the "secondary cell" of rechargeable batteries which can be reused many times, hand-savings, it is a good option instead of buying batteries which are used once.
2. there are standards and engineering techniques followed. there are two types of rechargeable batteries. the first one is multi-polar submersible in concentrated sulfuric acid and the other type is dry batteries.
3. restructuring of the rechargeable batteries located inside rechargeable batteries two poles, one of them is positive and called "cathode" and the other is negative and called "anode", inside each battery chemical parts and metal parts such as lead, nickel
4. battery charging is vary in terms of voltage and current capability, for example, the multiple efforts of the most famous batteries 12.24 volts. It is expressed by the current (AC / hour) or AHr AH. the batteries varies depending on the amount of power that can be connected to the battery for example: you can choose the batteries as follows: 12 volt Battery, 50 amp/hour 12 volt and 60 amp/hour 12 volt and 70 amp/hour 12 volt and 100/amp hour 24 volt and 200 amp/hour and the batteries can be more connected to the straight or parallel.
straight connecting meaning obtaining battery that have the total efforts and the same voltage, parallel connecting meaning getting a battery that have the total battery voltage, and the same efforts. for example when connecting the three batteries of 12 volts and 50 amps. It is a total of 36 volts and 50 amps.
The parallel conduction have a total 12 volts and 150 amperes. when charging the batteries the battery charger voltage must have equivalent to the total battery efforts, or more. And charging the battery depends on the speed of your current charger.

(1) Lead Acid Battery Lead Acid Battery
First, install the battery:
The main components of the battery, which include:
1. Fund:
2. The top cover: -
3. sheet:
4. liquid acid:
How to?!
2. Establish appropriate distilled water into the container volume
3. Add gradually the appropriate quantity of acid center to the water.
4. mix and stir well to measure the density of the solution and to make sure it in the normal range.
5. After the preparation added the solution to the battery cells through the openings filling
Note: - When you want to replace the old battery solution you must first discharge the battery from the old solution and wash the battery cells very well with distilled water and then add the new solution.
The battery mechanism Discharge phase: -

PbO2 + Pub + 2H2SO4 _______________ PbSO4 + PbSO4 + 2H2O
quick method
you can use ez battery reconditioning program or use the following steps
1. bring your old battery and put it in a polyethylene case and close it correctly
2. after you putted the battery in the suitable case. put the case in the fridge for about 12 hours
3. bring the case out from the fridge
4. remove any moisture or any water
5. after you dried the battery. put it in its device
6. let it get full of energy
7. use the device until the energy is over
8. do all of this steps 3-4 times