Battery operated toothbrushes

Non chargeable battery powered

— powered by a replaceable standard-sized non chargeable battery (batteries) — for example, an AA battery.

Both non chargeable and rechargeable batteries (see the relevant paragraph) are considered types of autonomous power sources, allowing the use of a toothbrush/irrigator even when no electrical socket are nearby. However, this option is relatively rare these days due to several factors. Firstly, non chargeable batteries are usually not included in the package, and using the device entails additional costs: you will either have to regularly buy non chargeable batteries or invest in rechargeable batteries and a charger for them. Secondly, replaceable power sources are generally bulkier than built-in rechargeable batteries, even with the same capacity.

On the other hand, this option also has clear advantages. Firstly, non chargeable battery-powered toothbrushes/irrigators are cheaper than rechargeable battery-powered ones. Secondly, a dead non chargeable battery can be quickly replaced with a fresh one, whereas an build-in rechargeable battery would need to be charged in such cases, which takes time and requires an external power source.