VOLTAGE: 18V LI-ION NOMINAL CAPACITY: 4.0AH BATTERY CELL: JIANSU SUNPOWER-2000MAH/10C CELL QUANTITY:10PCS MAX. CHARGE CURRENT:7.5A MAX OUT PUT CURRENT:60A STANDARD 2.2A CHARGING CURRENT-YT-828498, 120 MINUTES TO FULL CHARGE FAST 4.5A CHARGING CURRENT-YT-828500, 58 MINUTES TO FULL CHARGE STANDARD 7.5A CHARGING CURRENT-YT-828502, 36 MINUTES TO FULL CHARGE COMMUNICATION MODE:27K IDENTIFICATION RESISTOR; CHARGING AND CAPACITY INDICATOR WITH BALANCE VOLTAGE TECHNOLOGY; CURRENT-CARRYING REEDS OF SOCKET ARE PUT ARC EXTINGUISHED GREASE ON; HIGH-STRENGTH HIGH TEMPERATURE RESISTANCE ENGINEERING PLASTIC HOUSING; PCB BOARD IS SPRAYED WITH ORGANOSILICON 3-PROOFING PAINT,