The ST moisture sensors come with a CR2 battery that fits so snugly in the plastic housing that it is almost impossible to remove. The sensor comes with a fabric ribbon/strip to assist in removing the battery, but the end of the strip that it supposed to be firmly held by the housing rips off easily.
I finally used a screwdriver to take the battery out only to notice dents in the rechargeable (I know!) CR2 battery that I put in when I bought the sensor.
I am wondering if I can solder wires and connect the sensor to an external AA/AAA housing. Questions I have are:
- Whether CR2 batteries are 3V (as opposed to 3.xV - like 3.3V, etc)
- Whether I can replace the CR2 battery on the moisture sensor with a couple of AAs (or any other cheaper alternative)