USB speakers built-in battery can not recharge?
USB SPEAKER has been able to be carry out and play because that it has a built-in lithium battery. Generally charge a battery, you can play 4-5 hours straight, so have to re-charge when the battery runs out. Since the battery recharged, the battery life will be correspondingly shortened. Maybe later on one charge only play 1-2 hours. After years, in the end, the battery will be no longer rechargeable.
When the USB SPEAKER built-in battery is not rechargeable, what can you do? In general if the charger is not broke, so you had to change the battery. Non-professionals in general should not open the box, or it might ruin other circuits or cable, or take a wrong line, it is possible to burn PCB board.
Aftering replacing the battery, you must use the battery until run out, and then charge for 10 hours, continuous repeated three times, then in the future running out is not necessary, it can be recharging at any time. and 3 times, do not try to recharge the battery aftering running out, so to protect the battery, extending the battery life.

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