A 12v battery is a slightly irregular sized battery as compared to the typical battery cells that come to mind. Depending on its use it can be found in different sizes. They can be as small as AA batteries which are mostly used in digital cameras or as large as the batteries found in cars which are mostly used in boats and children's cars.
You can buy them in both rechargeable and non-rechargeable forms. It is better to opt for a rechargeable one as you can reuse it by simply charging it with a 12v battery charger. The non-rechargeable ones are going to be more expensive and if your device uses batteries often, then you may find yourself running out of batteries soon.
A charger for a 12v battery is rather bulky and is often called a 'smart' charger. People have now started to use solar battery chargers that use solar power to charge their batteries. Using solar power to charge batteries is environmentally friendly and it is not necessary that they can only charge a solar battery.
These chargers have solar panels that store light energy in the form of electric energy. To recharge a battery using solar power all you have to do is plug in a rechargeable battery. The rechargeable battery will take in the electric energy from the charger and store it as an electric charge.
You need to choose an appropriate solar charger depending on the battery that you want to charge. Solar chargers are the best choice for those who are concerned about the environment. Using these chargers means that you will use less electricity. Not only will you be using fewer natural resources, you will also have to pay less in bills. Batteries of cell phones and laptops require frequent charging and need to be plugged in consistently.
Now solar chargers have become portable and can be plugged into numerous devices using the USB cable. Technology in solar energy has become so advanced that there are cell phone casings that can absorb and store solar energy. This is then used to charge the cell phone when the casing detects that it is discharging.