Battery Health

ChZain wrote:

My battery health down very fast last day my battery health is 92% and today my battery health is 91%

That does not indicate that your battery health is going down quickly. It just means it is doing what battery health does: it decreases over time until your battery is no longer fit for use. There is NO WAY to stop that.

if one mistreats the battery it can cause it

try reading

Batteries - Maximizing Performance - Apple

Day by day dropping fast battery health

When it drops below 80%, contact Apple to have it replaced.