The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
Why does the battery maximum go down
All chemical batteries lose capacity over time. It has to do with oxidation and decay of the chemicals in the battery.
That’s why you eventually have to replace every battery, from a car lead-acid battery to a lithium polymer battery in a smart phone.
Why does battery maximum go down
