A hybrid car's battery pack is undoubtedly one of its most critical parts. A hybrid car uses a combination of an electric motor and an internal combustion engine. The gasoline that powers the engine is stored in fuel tanks, but the electric motor draws its power from another source. The battery pack stores the energy needed to power an electric motor in a hybrid car. The chemical reactions inside a battery are what make a hybrid vehicle possible. The battery pack is an important component of hybrid vehicles and has a prominent role. However, they can sometimes get a bad reputation. These car batteries are criticized by many hybrid tech skeptics. They don't have enough power and hybrid cars are slow because of this; they are too heavy which reduces hybrid's fuel economy; and the battery materials, such as lead, can be harmful to the environment, going against the "green" claim. This hasn't stopped battery manufacturers trying to improve their products. There are many ways battery packs can be improved. Here are five ways hybrid battery packs can be improved, in no particular order. Contents Battery Prices Less Expensive Lithium-ion Battery Advancements in Lead-acid Batteries Battery life is longer Weigh less