There are a number of places where one can purchase a battery charger for their solar car. Any good battery store will sell them. You can also purchase them online from sites such as eBay, Car Battery Chargers Central and Battery Stuff.
Exide batteries are manufactured by Exide Technologies, one of the world's oldest and leading manufacturers of lead acid batteries based in the US with global operations. W. W. Gibbs founded the company in 1888 under the name Electric Storage Battery Company, purchasing patents from inventor Clement Payen. The first battery carrying the Exide label was made in 1900. Exide means "excellent oxide".
Car battery boosters are not very challenging to find at all. In order to purchase a car battery booster, one can visit any retail store that sells products for vehicles such as Sears and Pep Boys.
The one I bought had Exide on the label, in small print.
Exide batteries can be purchased at retailers such as Sears, Menard's and Dick's Sporting Goods stores. They can also be purchased at Tractor Supply Company stores across the United States.
Car battery life varies depending on quality, but is normally specified by the manufacturer on the battery itself at the time of purchase. Some cars also indicate the battery level on the dashboard.
One can purchase a car battery tester online. The website amazon dot com sells such an item, for example. One can also visit the website wikihow dot com for a detailed guide on how to test ones car battery.
One can purchase a CR123A battery from a number of online and physical sources. For example, Amazon is just one online option to purchase the CR123A battery.
One can purchase the 2032 battery from Walmart where it is available for $11.54. One can also purchase this battery from Amazon, eBay, CVS and in the UK from Argos.
One can find reviews that discuss the best car batteries on the websites of Consumer Reports and Cars Direct. Best Covery, Amazon, and Yelp also have reviews one can peruse before purchasing a car battery.
I would stay away from Interstate batteries. I had a bad experience with them. I bought a 7 year battery, it went dead in 5 years. They would not credit me one nickel towards a new one. I bought an Exide battery instead.
Anyplace that sells batteries can sell you a replacement. You do not have to install a battery like the one that came in the car. Just but one of the same size with at least the same CCA as the OEM battery