Problem after updating to iso 26.2

SimhadriSaiVikash wrote:

Yes max capacity was 76%. Is this battery change will work ?

All we can say is that you will see exactly what you described when the battery needs replacing. You likely also have Service Warnings in your settings for the battery that have been ignored up until now. Normally those are seen when it drops under 80% and the battery replacement is expected at that time.

It's like taking your car to the shop because it is shaking and you have a flat tire. Absolutely the tire may be the cause and you can expect exactly that with a flat tire. You won''t be able to troubleshoot any further until you get that tire fixed.

It's about $100 for a battery change and you will need to consider if that is best spent on an iPhone 14 or if it is better to put that money into a new device purchase. No one here will be able to predict if there is a Logic board problem or if that will fail next month where you would likely need to purchase a new phone anyway.

SimhadriSaiVikash wrote:

My battery percentage was 76%.

If you mean that, under Settings>Battery>Battery Health>Maximum Capacity, you're seeing 76%, you need a new battery.

iPhone Repair and Service - Apple Support

A dying battery can cause all sorts of issues.

Hello, I’m experiencing the same issue with my iPhone 14 Pro. It suddenly shuts down 2–3 times, with about a 5–10 minute interval before restarting again.

Sometimes, when it powers back on, the battery shows 1% even though it was actually around 90%. After restarting it twice, the battery level returned to 90%.

The shutdowns happen randomly, and I’m not sure what’s causing them. This problem only started after I updated to iOS 26.2.

What is your Battery Health percentage at Settings > Battery > Battery Health > Maximum Capacity? If that one is under 80%, then you need a battery replacement. Also seen when the battery was replaced by an unauthorized service provider.

If you have not performed a Force Restart to do some house keeping after the update, I would also recommend that:

• Press and quickly release Volume Up
• Press and quickly release Volume Down
• Press and HOLD side button until the Apple Logo appears. This may take up to 15 seconds while holding the side button and you have to ignore anything else on the screen. If you do not see the Apple logo, try again as it may take a couple of attempts to get the speed and sequence correct.

iRalphiiee wrote:

Hello, I’m experiencing the same issue with my iPhone 14 Pro. It suddenly shuts down 2–3 times, with about a 5–10 minute interval before restarting again.

The shutdowns happen randomly, and I’m not sure what’s causing them. This problem only started after I updated to iOS 26.2.

Sounds like your Battery Health may be under 80% and it is time to have it replaced. Your battery on the iPhone 14 is only expected to last 500 charge cycles before reaching 80% and the update did not change your charge cycles. It certainly can put more demand on a battery, but a weak battery prior to the update should have already been replaced, and may even have a Service Warning in settings for the battery.

Tap Settings > Battery > Battery Health & Charging.

If the Maximum Capacity is less than 80%, you need to have the battery replaced at the Apple Store / Genius Bar or an authorized Apple service shop.

Even if the Maximum Capacity is above 80%, you still need to take the phone in to have it checked and tested.

Genius Bar Reservation and Apple Support Options - Apple

The battery needs replacing urgently by Apple https://support.apple.com