Features: Can protect batterys and prolong the service life of batterys. Used to Charging/discharging three groups of lithium batterys in series. Each group can connect multiple lithium batterys in parallel. Overcharge protection, over discharge protection, over current protection, short circuit protection. Can be used in electric drills, sprayers, Leds light, ect. Specifications: Version: Enhance Charging-Voltage: D C12.6-13V Maximum Working current: 60A (Nice heat dissipation condition) Continuous Charging-Current: up to 20A Continuous Discharge Current: up to 40A Overcurrent Protection: 125A Overcharge Detection: 12.8A (for 3 groups of batterys) Overcharge Release: 12.3A (for 3 groups of batterys) Overdischarge Detection: 2.4V (for 1 group of batterys) Overdischarge Release: 3.0V (for 1 group of batterys) Short Circuit Protection: Yes Working Temperature: -40~85 Storage Conditions: -40~125 Item Size: 55 * 41 * 4mm / 2.16 * 1.61 * 0.16in Package Size: 120 * 80 * 12mm / 4.72 * 3.15 * 4.72in Package Weight: 10g / 0.35ounces Package List: 1 * Protective Board