I recently bought a pre-owned iphone 11 with no evident issues and a decent battery health of 89%. The battery haven’t been replaced and is around 2 years old. After around 15 days, the battery health dropped by 2%. I never let the phone go below 20% as well. Is this normal or should I be worried?
About 1-2% per month is considered normal. With a used device it is hard to tell if somebody was using optimized battery charging which is supposed to ensure optimal battery lifespan. Also the battery health feature isn't linear so I would expect some small variation in the drop in %. I wouldn't be overly worried unless it continues to drop at 4% per month, and that's only if you are a light user of the device.
If it does drop below 80%, consider getting it replace.
Batteries are consumables and 1-2% loss per month is perfectly normal. According to iPhone Battery and Performance - Apple Support , Apple apparently only considers it unusual (and warrantable) if a battery drops below 80% maximum capacity in less than a year after you receive it. Ergo, some storage loss as you use it is expected and acceptable. Incidentally, that possible 20% drop over the first 12 months equates to 1-2% drop per month being within the range of what Apple finds acceptable.
Go to this web site for information about how to request battery service for your iPhone: iPhone Battery Repair & Replacement - Apple Support
For cost and availability, enter your model information in the "Get an estimate" box at the bottom. (I will let you do this since the answer will depend upon the country where you are located.)
For instructions on how to get your iPhone, iPad, or iPod touch ready for service click here --> Get your iPhone, iPad, or iPod touch ready for service - Apple Support
About 1-2% per month is considered normal. With a used device it is hard to tell if somebody was using optimized battery charging which is supposed to ensure optimal battery lifespan. Also the battery health feature isn't linear so I would expect some small variation in the drop in %. I wouldn't be overly worried unless it continues to drop at 4% per month, and that's only if you are a light user of the device.
If it does drop below 80%, consider getting it replace.
Batteries are consumables and 1-2% loss per month is perfectly normal. According to iPhone Battery and Performance - Apple Support , Apple apparently only considers it unusual (and warrantable) if a battery drops below 80% maximum capacity in less than a year after you receive it. Ergo, some storage loss as you use it is expected and acceptable. Incidentally, that possible 20% drop over the first 12 months equates to 1-2% drop per month being within the range of what Apple finds acceptable.
Go to this web site for information about how to request battery service for your iPhone: iPhone Battery Repair & Replacement - Apple Support
For cost and availability, enter your model information in the "Get an estimate" box at the bottom. (I will let you do this since the answer will depend upon the country where you are located.)
For instructions on how to get your iPhone, iPad, or iPod touch ready for service click here --> Get your iPhone, iPad, or iPod touch ready for service - Apple Support
Iphone battery health
