3.6V;
Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Lithium metal batteries were first proposed and studied by Gilbert N. Lewis in 1912. In the 1970s, M.S Whittingham proposed and began studying lithium-ion batteries.
The voltage of the lithium battery is 3 times that of the other two. In addition, the weight of lithium batteries and nickel-cadmium batteries of the same type is almost the same, while nickel-metal hydride batteries are heavier.
It can be seen that the weight of each battery is different, but the lithium battery has a high voltage of 3.6V. By producing the same voltage, the number of individual batteries can be reduced by 1 /3. , so that the battery formed is small in weight and small in size.