When the capacity of your iPhone battery dips below 80%, you'll see the following message: “Your battery's health is significantly degraded. An Apple Authorized.
It is strongly recommended that you change your toothbrush or toothbrush head every three months, when the bristles are worn or frayed, or if you become ill.
Older vehicles recommended the first oil change at about 500 miles because they had “break in oil” (essentially mineral oil) in the engine. That being said; you.
In general, an hour or two between changes is fairly typical. It takes a while to produce more urine or feces, so you can expect more than 15 minutes before.