iPhone battery health at 98% after 7 months

A 2% drop in 7 months is doing great.

Batteries degrade over time with usage due to chemical aging.

You can expect about a 1% drop per month with average use on an iPhone. This is an approximation, that is why it may be plus or minus a few percent on a month to month basis.

Apple recommends replacing it when it reaches 80%.

iPhone Battery Replacement.

iPhone Battery Replacement - Apple Support

About Lithium Ion Batteries

iPhone battery and performance - Apple Support (IN)

Here are some tips on maximizing battery life.

Batteries - Maximizing Performance - Apple

Your Battery Health is exceptional after 7 months of use. On average there is usually a drop of about 1% per month when measured over several months or about 1% drop for every 25 charge cycles. Don't be alarmed if you do see it drop again as that is just the average evening out.

As for having to charge your battery more frequently, I suspect you may have some Meta apps installed such as Facebook, Messenger, Instagram, or WhatsApp. The latest updates of these apps have had a terrible effect on users battery performance and it is going to take a correction from Meta to provide an update to optimize the performance of their apps.

I would say that’s really good. I have an iPhone 13, and I got it for Christmas last year, and it is at 98%. All that means is that your phone’s battery will slowly die over time, and as @Kurtosis12 said, you should get it replaced at around 80%. It’s perfectly normal for it to drop.

Here's a bit of background about what Apple expects of a battery.

To learn about maximizing (and the difference between) battery life and lifespan, read this support document --> Batteries - Maximizing Performance - Apple

Read this support article about iPhone battery and performance to learn about the battery health feature and what is considered normal performance --> iPhone battery and performance - Apple Support

To see the feature go to: Settings > Battery > Battery Health

"A normal battery is designed to retain up to 80% of its original capacity at 500 complete charge cycles when operating under normal conditions. The one-year warranty includes service coverage for a defective battery. If it is out of warranty, Apple offers battery service for a charge." A degraded battery may display the notice: "Your battery’s health is significantly degraded. An Apple Authorized Service Provider can replace the battery to restore full performance and capacity." If it is not at or above 80% "normal", consider contacting Apple about a battery replacement. --> iPhone Battery Replacement - Apple Support

According to the above quoted information, you could be losing almost 2% per month the entire first year before Apple would deem this to merit a warranty replacement.

Your battery is doing much better than average. Normally, a 7 month old battery would be at about 92-94%.

You might want to send flowers to Apple.