Well now we've a new string to our bow:

We can replace your toothbrush battery – no need to scrap it – bring it along and our "dental mechanic" can take out your dead battery and supply and fit a new one for less than twenty quid (and we recycle your old battery!)

We gain business, you gain effectively a new electric toothbrush, and the planet gains less waste and environmental damage

Thats a Win. Win, Win…