iphone battery health issue

i bought an iphone 15 used which had 96% battery health and around 231 cycles now its gone from 96 to 94 in 15 days im worried why is it dropping so quickly any advice? i charge it properly and dont game or anything

iPhone 15

Posted on Jan 19, 2025 4:58 PM

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Posted on Jan 19, 2025 5:51 PM

May I ask where did you purchased this used iPhone? I know that refurbished iPhones from Apple come with a new battery at 100%, and I would expect that to be the case at most refurbished retailers. 


Your iPhone battery health is expected to drop about 1% for every 50 charge cycles, and the decline isn’t always linear. Meaning some months you will lose more than expected, other months none at all. 


Also when your iPhone was at 231 charge cycles, it should have been at 95% health, so you were ahead of your battery at that time. It’s possible that now your iPhone’s battery health is declining at a normal rate. 


Keep in mind, all rechargeable lithium batteries chemically degrade over time. When your battery health reaches 80%, have the battery replaced.

2 replies
Question marked as Top-ranking reply

Jan 19, 2025 5:51 PM in response to idkmoiz

May I ask where did you purchased this used iPhone? I know that refurbished iPhones from Apple come with a new battery at 100%, and I would expect that to be the case at most refurbished retailers. 


Your iPhone battery health is expected to drop about 1% for every 50 charge cycles, and the decline isn’t always linear. Meaning some months you will lose more than expected, other months none at all. 


Also when your iPhone was at 231 charge cycles, it should have been at 95% health, so you were ahead of your battery at that time. It’s possible that now your iPhone’s battery health is declining at a normal rate. 


Keep in mind, all rechargeable lithium batteries chemically degrade over time. When your battery health reaches 80%, have the battery replaced.

Jan 19, 2025 6:00 PM in response to idkmoiz

All rechargeable batteries are consumable components that become less effective as they chemically age.


Recent software updates can accelerate that process by adding features that consume more power.


As lithium-ion batteries chemically age, the amount of charge they can hold diminishes, resulting in shorter amounts of time before a device needs to be recharged.


Apple won’t replace the battery until it reaches 80% capacity.


Li Ion (Lithium Ion) batteries have recharging capabilities; however there are limits.


I recommend to slow charge your iPhone to maximize the charge capacity, battery health and efficiency. ⚡️🔋


NOTE:

Capacity loss in standby applications is largely determined by temperature.


Charge above -30°C and discharge below 55°C for best results.


Battery Performance Tips:



Click ▶︎ iPhone User Guide. 📖


Good luck! 👋🏼😉

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iphone battery health issue

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