Generally, the first charging of Bluetooth small speakers takes 2-3 hours. Look at the charging current, there is a small capacity lithium battery (about 0.5ah polymer lithium battery) inside the small audio, the charging current is not much at the design time, usually about 0.2a, the loss of power begins to charge, charging time in different audio, 3 to 5 hours. A fully charged Bluetooth speaker can be used for 9-10 hours. When charging, it is best to shut down and charge, one is good for the battery of the Bluetooth speaker, and the other is faster to charge.
However, it should also be noted that some portable small speakers do not have a charging control circuit, and there is no display after full charge, if you continue to charge it is easy to charge the battery drum, causing damage.
Three or four displays full
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The capacity of the portable audio battery is not the same, the length of charging time, one is based on the capacity of the battery, and then look at the output current of the charger, the most is to use the same 5C lithium battery with Nokia mobile phone, this battery with the output current 500-600mA charger takes about three or four hours, and some time is longer, but pay attention to, There is no charging control circuit in some portable audio, there is no display after full charge, if you continue to charge it is easy to charge the battery drum, causing damage.