every time i do this i sweat the bubbles and its never made a difference. the length of the battery will depend on the amount of brushing and how many people are using one handle. not even enough to pick the litter out of their own patch of garden, never mind the street, it seems, let alone weed the thing, or do anything past their own gate. and it looks like we’re finally getting to that end. continue adding the flour, ½ cup at a time, to make a smooth soft dough that is just slightly sticky. 