Is it advisable to put your Apple phone on power saving mode when the phone is 50 and above percent?

It's a personal preference. I have a friend who almost always uses it because nothing it turns off or throttles is important to her and she's more interested in battery saving. I use it when I expect not to have access to charging for a while and know I'll need the phone.

When Low Power Mode is on, your iPhone or iPad will last longer before you need to charge it, but some features might take longer to update or complete. Also, some tasks might not work until you turn off Low Power Mode.

Low Power Mode reduces or affects these features:

• 5G (except for video streaming) on iPhone 12 models1
• Auto-Lock (defaults to 30 seconds)
• Display brightness
• Display refresh rate (limited up to 60 Hz) on iPhone and iPad models with ProMotion display2
• Some visual effects
• iCloud Photos (temporarily paused)
• Automatic downloads
• Email fetch
• Background app refresh

From: Use Low Power Mode to save battery life on your iPhone or iPad - Apple Support

I never use low power mode. whether it is 'advisable' is going to be quite subjective.

Does your iPhone battery not last thru the day? No opportunity to top off your charge during the day?

Low power mode can affect some features..

Use Low Power Mode to save battery life on your iPhone or iPad - Apple Support

Personally, if I were to turn on Low Power mode at some point, it would likely be because I hit 20-30% and would not have access to charge in the next several hours.

I can't find any documentation from Apple that recommends that you switch to Power Saving Mode at 50%, so while it would probably not hurt to do this, I doubt that it would help unless you are consistently running low on battery power every day.

As you know, the phone will automatically switch to Low Power Mode when it feels that it needs to.

Personally, I have never manually switched to Low Power Mode on my iPhone, but that's me.

Bob Timmons wrote:

As you know, the phone will automatically switch to Low Power Mode when it feels that it needs to.

Does it? I've had the phone ask me if I want to switch to Low Power when I get the 20% warning but if I don't select yes, it doesn't. It does automatically turn off when the phone charge reaches 80%.

Bob Timmons wrote:

You are correct, I've glanced at the 20% warning and haven't paid attention to it.

Darn. I was hoping you knew a secret. I would like it if it did it automatically at 20%. I've seen long, complicated instructions for automations. Guess I'll have to keep pestering Apple to make it an option.

You are correct, I've glanced at the 20% warning and haven't paid attention to it.