I am developing an IoT product for a company.
The product runs off of two alkaline batteries at a max of 3.2V. It is fully enclosed in a solid plastic case, with small panel openings for a switch and LED. It broadcasts cellular data.
I will test until the case is able to contain a short on the batteries without damaging/excessively heating its surroundings. This is the worst-case fault I can imagine for the product, under any normal conditions.
If the company and I are satisfied that the product is safe, does it need certification to be deployed to a customer's house unattended? My region is Ontario, Canada. If it needs certification, what is the lowest cost that could be expected?