9V battery powered breathalyzers

PP3

— replaceable batteries of the PP3 size are rectangular in shape, with contacts on one of the ends and a voltage of 9 V. Such a voltage is not required in breathalyzers so often, therefore this type of power supply has not received distribution — it is found only in some advanced models, for which it is not enough weaker batteries.

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.