with deye inverter 48v18650 4000mAh 18V Cordless Drill Power Tool Battery for Makita BL1815 BL1820 BL1825 BL18302600mAh 7.4V 18650 Li-ion rechargeable battery with PCB protection board FOR Speaker 2S1P 2.6Ah 7.4 volt 19.24wh batteriesbatteries24v lithium ion batterypolymer lithium ion battery ...