AA battery powered breathalyzers

AA

— replaceable AA batteries are well-known "finger" cells. Despite the general popularity, due to the relatively large size, they are relatively rare in breathalyzers — less often than the same AAA.

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.