The first method is to connect three chargers in series to charge the battery (note that if one charger loses power in the middle, it may cause the charger to fail)
The second The method consists of connecting a wire from the battery to the negative terminal of charger No. 1, then to the positive terminal of the third battery counting from the negative terminal of the battery; positive terminal of charger #1, and connect it to the positive terminal of charger #1. Connect a wire from the positive terminal of the 6 batteries to the positive terminal of charger no. 2; 3 to the positive terminal of charger No. 2, and connect a wire to the positive terminal of the ninth battery (the positive terminal of the battery) Connect the wire to the positive terminal of charger No. 3 to charge. As the picture shows:
Note that the three chargers must be: 12.6V constant current and constant voltage charger
Required when charging with a special batterywithout lithium. charger One thing to note: lithium batteries must have their own lithium battery protection circuit.
If there is no protection circuit, the lithium battery may be overcharged during charging, and the lithium battery may explode if the consequences are serious...
Generally, the saturation voltage of lithium batteries is 4.2 volts.
Therefore, when two identical lithium batteries are charged in series, a voltage greater than 8.4 volts must be supplied; Typically, a regulated power supply with an output of 10-12 volts can be used for charging.
When charging lithium batteries, also be careful: avoid using pulsed voltage charging.