If the charger you choose is an 8.4V constant voltage charger, charge it after the battery runs out.
The charging current will be large at first. the battery voltage increases, the current will gradually decrease. You will therefore feel that the charger will start to heat up. You can either choose a constant current charger (4.8a
or 5a)
<. p>,< p>If you still need to use a constant voltage charger, the current 2a is too low.Try to choose a higher current such as 10a,
< p>or 20a.I hope this can help you.
Usually it is 800 mA. The charging limit voltage of a 7.4V lithium-ion battery is 8.4V. If charging occurs, the charging is easy to calculate. It depends on the voltage at both ends of the battery. The current multiplied by 2 A is the power of the load. The battery voltage will increase from the initial 7.2 V to 8.4 V. the battery is not dischargeded, the battery voltage will continue to increase to about 8.60V. If there is no protection circuit protection at this time, the voltage will continue to increase to 12V (of course , it may be overloaded or even explode). the middle!