AAA battery powered breathalyzers

AAA

— replaceable AAA batteries — "mini finger" or "little finger". Due to their small size, they are quite popular in entry-level and mid-level compact breathalyzers; the capacity of such elements is small, but it is quite enough for the devices where they are used.

All replaceable batteries (regardless of size) are convenient because they can be quickly replaced with fresh ones. In addition, the user can choose the brand of batteries of their choice and even purchase items in the form of rechargeable batteries. On the other hand, you often need to buy such power supplies separately from the device.