ITEM NAME:24V 6S 20A 18650 Li-Ion Lithium Battery Protection Board Solar Lighting Bms X9W4 24V 6S 20A 18650 Li-Ion Lithium Battery Protection Board Solar Lighting Bms X9W4 Maximum discharge current: 20A Instantaneous discharge current: 35A Charging voltage: 25.5V Maximum charging current: 20A Overcharge detection voltage: 4.25Â ±0.025V Overcharge protection delay: 1.0Â ±0.5S Overcharge release voltage: 4.15Â ±0.05V Battery balance detection voltage: 4.125Â ±0.025V Battery balance release voltage: 4.125Â ±0.05V Battery balance current: 41Â ±5mA Overdischarge detection voltage: 2.7 Â ± 0.1V Overdischarge detection delay: 1.0Â ±0.5S Overdischarge release voltage: 3.0Â ±0.1V Overcurrent detection voltage: 100mV Overcurrent detection delay: 1Â ±0.3S Overcurrent protection current: 40Â ±5A Overcurrent protection release.Maximum charging current: 20A. Short circuit protection condition: external load short circuit. Short circuit protection release condition: disconnect load. Main circuit conduction internal resistance: less than equal 20mÃŽ ©.