Rechargeable speakers are mostly low-power speakers, the internal use of lithium batteries, only some of the power of the larger square dance with the speaker may be the use of free battery, charging as long as the use of the original charger charging on the line, if there is no or lost, if it is the USB port can be used to charge the cell phone charger, the lithium-ion charging are now well-designed charging management chip to complete, the charging is not required to manually special to worry about how to charge. There is no need for artificial special to worry about how to charge.