We strongly recommend alkaline batteries to be used in the breathalysers.

Rechargeable lithium batteries can also be used.

All batteries must be non-heavy duty.

✅ Alkaline batteries

✅ Rechargeable lithium batteries

❌ Heavy duty batteries

Why we recommend to only use alkaline batteries or lithium rechargeable batteries.

Alkaline batteries last longer and have a better discharge curve compared to their non-alkaline counterparts, owing in part to their stable voltage which only drops off towards the end of the battery’s life. On the other hand, non-alkaline heavy-duty batteries have a gradually decreasing discharge rate with time which can impact the accuracy of breathalysers because these batteries require a stable voltage for a breathalyser to function properly. With rechargeable batteries, opt for lithium batteries instead of nickel-metal hydride batteries as these batteries are more durable and stable for use in breathalysers.

Remove batteries when not in use.

Fresh batteries slowly deplete even when left unused in an electronic device for some time. As liquid electrolytes in the batteries break down, the built-up gas can rupture the batteries’ outer casing, causing leakage of corrosive electrolytes in the form of white goo. This can corrode and damage the breathalyser’s circuit.

It is easy to forget about the batteries when a breathalyser is left unused for weeks. Hence, it’s a good practice to remove the batteries before storing your breathalysers.

Read more in our blog post 10 tips for caring for and maintaining your breathalysers