Requires 12/3.7=3.2. Take 3 (preferably 4) single lithium batteries and connect them in series to meet the voltage requirements;
Generally, the capacity of a single lithium battery is 2500 mAh 80. / 2500*1000=32, which can be connected in parallel to meet capacity requirements;
A total of 3*32=96 single lithium battery cells are required.