If you travel with your electric toothbrush, you may require an electric toothbrush socket adapter to ensure you can plug it in wherever you are. Most electric toothbrushes come with 2-pin shaver plugs (not to be confused with 2-pin continental plugs), and these can be easily plugged into a standard 3-pin plug with a 3-pin adapter for electric toothbrush, also known as a shaver adapter. Some models charge from USB which makes them ideal for travelling.
If your toothbrush stops charging it doesn’t signal the end of its life. For example, the Oral-B electric toothbrush charger adaptor charges any Oral-B toothbrush. If charging is poor or intermittent, it may be possible to replace the battery. This is highly model dependent so consult the manufacturer if you wish to do this.