Today, batteries are used almost exclusively for the use of mobile phones. These offer the advantage over traditional batteries that they can be recharged, thus saving a corresponding number of primary cells. However, the consultation hours specified by the manufacturer can be considerably shortened if the electricity is not used carefully.
Modern smartphones run on rechargeable lithium-ion batteries. These can then be presented in different versions, for example as lithium-ion, lithium-polymer and also hybrid lithium-ion-polymer batteries. In old mobile phones, on the other hand, batteries made of nickel and cadmium compounds were used. The basic functionality of lithium-based batteries resembles that of the nickel-cadmium version: The energy is generated by exchanging the electrons between the electrodes of the participating elements. The electrolyte involved in the modern smartphone batteries consists of a lithium salt, while the nickel version uses potassium hydroxide solution.
Nickel-cadmium batteries have also been known to be associated with the so-called memory effect; this phenomenon is referred to as the phenomenon of not discharging the battery completely each time it is charged and losing capacity. Nickel-metal hydride batteries were used