Phone battery: myth or fact?

The questions

1. Question 1 of 7Your Galaxy unplugs at 96% every morning. Which option on this real screen explains it?

   

   • Basic
   • Maximum
   • Sleep time protection
   • None: the battery is faulty

   Show answer

   Answer: Basic

   With Basic, charging stops at 100% and only starts again when the level drops to 95%, so 96% after a long charge is normal. Maximum stops at a level you set.

   Source: Samsung CA: Set a maximum charge level on your Samsung Galaxy; Samsung UK: Galaxy Battery protection feature in One UI 6.1

   Galaxy won't charge to 100%?

2. Question 2 of 7Which charge limits can you pick on an iPhone 17e with iOS 27?

   

   • Any number from 50 to 100
   • 80, 85, 90, 95 or 100%
   • Only 80%
   • There is no limit

   Show answer

   Answer: 80, 85, 90, 95 or 100%

   The Charge Limit slider has five stops: 80, 85, 90, 95 and 100%. Apple says Charge Limit is for iPhone 15 models and later.

   Source: Apple Support: About Charge Limit and Optimised Battery Charging on iPhone

   Set a charging limit on an iPhone

3. Question 3 of 7Myth or fact: every iPhone shows its battery cycle count in Settings.

   

   • Fact
   • Myth: Apple says iPhone 15 models and later

   Show answer

   Answer: Myth: Apple says iPhone 15 models and later

   Apple's guide says the cycle count, manufacture date and first use date show on iPhone 15 and later. Our iPhone 14 Pro shows only Maximum Capacity; our iPhone 17e shows Cycle Count too.

   Source: Apple iPhone User Guide (iOS 27): Understand your iPhone battery usage and health

   Battery health on iPhone, Galaxy and MacBook

4. Question 4 of 7What does "Maximum Capacity" on an iPhone mean?

   • How fast it charges
   • How much charge the battery holds now compared with when it was new
   • The biggest charger it accepts
   • Storage space

   Show answer

   Answer: How much charge the battery holds now compared with when it was new

   Apple describes it as a measure of battery capacity relative to when it was new. Our iPhone 14 Pro reads 82%: a full charge holds about four fifths of what it did on day one.

   Source: Apple iPhone User Guide (iOS 27): Understand your iPhone battery usage and health

   Check battery health on an iPhone

5. Question 5 of 7Low Power Mode on an iPhone switches itself off when…

   • It is midnight
   • The phone is charged to 80%
   • An hour has passed
   • Never

   Show answer

   Answer: The phone is charged to 80%

   Apple says Low Power Mode turns off by itself when the iPhone is charged to 80%. While it is on, the battery icon turns yellow.

   Source: Apple Support: Use Low Power Mode to save battery life on your iPhone

   Turn on Low Power Mode on an iPhone

6. Question 6 of 7A Pixel 10a says battery health "Reduced". What does Google say that means?

   • Low on charge right now
   • Capacity is below 80%: consider a replacement
   • Battery Saver is on
   • It is too cold

   Show answer

   Answer: Capacity is below 80%: consider a replacement

   Google says Reduced means the capacity is below 80%, and to consider a battery replacement. The status shows on Pixel 8a and later.

   Source: Pixel Phone Help: Understand your Pixel battery

   Check battery health on a Pixel

7. Question 7 of 7Which sign does Samsung list for a Galaxy battery that needs replacing?

   • The case feels warm in summer
   • It turns off unexpectedly, especially in the cold
   • The wallpaper fades
   • Calls sound quiet

   Show answer

   Answer: It turns off unexpectedly, especially in the cold

   Samsung lists a battery that drains quickly after charging, and a phone that turns off unexpectedly, especially in the cold.

   Source: Samsung US: Determine when your Samsung Galaxy phone battery needs replacing

   Battery health on iPhone, Galaxy and MacBook