Here is some infos about an OMG compatible water leakage sensor.
The sensor is powered by two AAA batteries, The part detector part of the sensor is at the end of a 1m cable, it is connected by a 3.5mm jack.
There is 2 buttons on the left side of the sensor.
The lower one enable to simulate the water contact(in my case it sends 80756) . The upper one send another signal (80760) not explained yet.
Sleep current <10uA continuously (measurement below my multimeter accuracy)
AAA battery capacity is 1000mAh
Sleep current per day ->0.01mA * 24 =0,24mAh per day for sleep
Total per day: 0,24mAh
1000/0,24=4166 days -> around 11 years … of course this doesn’t take into account the battery discharge rate.
When triggered with water the power consumption is 12mA
signal with water:
Power consumption when no action