How do I know which smoke alarm model I have?

The differences between Jalo Helsinki Smoke Alarm models.
If in doubt, there are several ways to recognise which smoke alarm model you have. Jalo Helsinki has manufactured 2 lines of different smoke alarms; 10-year battery models launched in 2017 and Original models launched in 2012. Below there are listed the differences of the models.
 
Batteries
In 10-year model there are no replaceable batteries at all, but only a fixed battery which you cannot visually see.
In the Original model, there are 3 replaceable Lithium coin batteries of a type CR2450.

Colors
Both 10-year models and  Original models have slightly different color designs.
 

Original models (2012-2017)

Package

In addition, the packages are different for each model