The charging time of lithium batteries is generally 3-5 hours. Early batteries were nickel hydrogen batteries, but lithium batteries do not have a memory effect and do not need to do so. Excessive charging time can affect the battery's cyclic service life.

Lithium batteries are batteries that use lithium metal or lithium alloy as the anode material and non-aqueous electrolyte solutions.

The difference between lithium batteries and lithium-ion batteries is that the former is a primary battery, while the latter is a rechargeable battery. Due to the highly reactive chemical properties of lithium metal, the processing, storage, and use of lithium metal have high environmental requirements, so lithium batteries have not been applied for a long time. With the development of microelectronics technology at the end of the 20th century, the number of miniaturized devices is increasing, which has put forward high requirements for power supplies. As a result, lithium batteries have entered a large-scale practical stage.