ZOGUO 21V 20A Fast Charger for 5S 18.5V/18V Lithium Battery Pack - Crocodile Clip Connector | Perfect for Power Tools, Electric Scooters & Outdoor Equipment

Protect Characteristic1.Short-circuit protection2.Over-current protection3.Over-voltage protection4.Reverse Polarity Protection5.Over-temperature protectionWork Conditions:Ambient temperature: -5 - 40RH: 5 - 95%Max. altitude: 10000 meterCooling: chargers use of forced air cooling system. Under dustless and ventilated conditions, the full load temperature rise not exceeding 40.Storage conditionsAmbient temperature: -40 - 70RH: 0 - 95%Max. altitude: 20000 meters.