Mobile phone batteries generally have battery protection circuit, when the battery is fully charged, it will start protection to prevent the battery from overflushing, similarly, when the battery power is used too little voltage is too low, it will start protection to prevent the battery from overdischarging and causing the battery to fail, at this time, it is necessary to activate the battery.
1 First use the battery universal charge to charge the battery for 1-5 hours after the audio can be directly charged with the line of the audio belt.
2 The audio maintenance power supply to 5V, the positive side of the power supply to the positive and negative side of the battery after a touch away, continuous touch 3-5 times can generally be used to charge the audio tape line.
Need to connect your charger, continuous charging can solve the loss of power