12-volt lithium batteries are currently available on the market with ratings ranging from 2 amp-hours to 5 amp-hours. Generally, those with more than 4 amp hours are used for large screen mobile phones, and most mainstream mobile phones use 3 amp hours.
Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses non-aqueous electrolyte solution. Lithium-ion batteries generally use lithium alloy metal oxide as the positive electrode material, graphite as the negative electrode material, and non-aqueous electrolyte. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable.
The way to connect b3.2 volt ateries in series with 12 volt wiring involves combining 4 strings. The lithium iron phosphate battery has a nominal voltage of 3.2V, a charging voltage of 3.6V and a discharge cutoff voltage of 2.0V. To obtain a 12V battery, a combination of 4 strings is required, i.e.: 3.2 V. *4 strings = 12.8 V (called 12 V). The battery cells can be transformed into 2 parallel, that is, 4 series and 2 parallel combinations.