We need to understand that there are no best universal batteries in general. They can be the best from different points of view dealing with various tasks. Each system has its own disadvantages and advantages. Anyways, the AGM battery type is definitely the best since these batteries do not have a liquid medium and therefore have a number of advantages. Almost all modern manufacturers focus on such batteries and recommend using them on cars. In terms of energy intensity, we can point out several batteries from trusted manufacturers. The Odyssey and Delphi batteries have an impressive 65 and 60 ampere-hours capacity, which makes them the most capacious on the market. They have many AGM batteries advantages and are not afraid of intense use and heavy loads. They should be purchased if your car consumers much electricity for music systems, lifting doors, computer processors, and other devices. Such batteries work for a very long time, they easily start the system at low temperatures and are resistant to vibrations. If we consider the best engine batteries with the highest index of starting at low temperatures, the leaders here are Optima and XS Power. They can start the engine at temperatures lower than - 30 degrees. In addition, they are not afraid of long-term storage at low temperatures. The XS Power battery is commonly used on sports cars, as they show great power when starting the car, have sufficient capacity, and are not afraid of constant vibrations. Such a battery can be installed in different positions - the electrolyte won't spill, and the terminals will not disconnect from the contacts.