4 in 1 Intelligent Battery Charger With USB Cable for DJI OSMO+, OSMO Pro/Raw Battery HB02-542465

hello welcome to this DJI tutorial video this video will show you how to assess whether or not your Osmo battery or battery charger are damaged battery charger appearance check if the AC cable port is mechanically damaged and if the metal surface is turning black or burnt check if the four pins for connecting the battery charger are mechanically damaged and if the metal surface is turning black or burnt led if you don't connect the AC cable the led should be off even if the AC cable is not connected the LED should still turn green when a battery is inserted function and performance connect the AC cable to a power outlet and measure the first and fourth pins voltage with a multimeter voltage should be between 12 point 5 volts and 12 point 7 volts with the charger plugged in attach a battery without full charge the LED should go from green to red when the battery is fully charged the LED