Lithium-ion chemistry performs well at elevated temperatures but prolonged exposure to heat reduces battery life. Li‑ion batteries offer good charging performance at cooler temperatures and may even allow "fast-charging" within a temperature range of 5 to 45 °C (41 to 113 °F). A lithium-ion or Li-ion battery is a type of that uses the reversible of Li ions into solids to store energy. In comparison with other commercial Generally, the negative electrode of a conventional lithium-ion cell is made from. The positive electrode is typically a metal Lithium ion batteries are used in a multitude of applications from, toys, power tools and electric vehicles.More niche uses include. The lifespan of a lithium-ion battery is typically defined as the number of full charge-discharge cycles to reach a failure threshold in terms of capacity loss or impedance rise. Manufacturers' datasheet typically uses the word "cycle life" to specify lifespan in terms. Research on rechargeable Li-ion batteries dates to the 1960s; one of the earliest examples is a CuF 2/Li battery developed by in 1965. The breakthrough that produced the earliest form. Lithium-ion batteries may have multiple levels of structure. Small batteries consist of a single battery cell. Larger batteries connect cells Because lithium-ion batteries can have a variety of positive and negative electrode materials, the energy density and voltage vary accordingly.The is higher than in (such as,.