My MM crashed in salt water. After thorough cleaning and drying (all boards removed) drone would not detect the battery (leds 3&4 blinking three times when connected to charger). I opened the battery and found it totally damaged. I bought a new OEM battery online but drone still blinks the same. How can I tell if the new battery is bad or if there is an internal board problem?. I have read that these batteries are put in a hibernating mode for shipment by air. I do not have a charging hub.
Your help will be appreciated!
Your help will be appreciated!