test batterie iphone; coconutBattery, iBackupBot; nombre de recharge; iphone battery cycle count limit

Here are my questions:

1. I have received contradictory information on the maximum battery cycle count for the iphone 5 and 6. I have heard that the 5 has a maximum of 500 cycles before it experiences a 20% degradation and the 6 has a maximum of 1000 cycles. Other websites have stated that all iPhones have a maximum of 500 cycles and only the macbooks have a 1000 cycle maximum. Which is true?

2. If the cycle count is 500 cycles max, why is the 5's battery health rated as BAD to VERY BAD? It's still below the 500 maximum so in theory it should not have experienced any degradation before it hits 500 right?

3. Also, I am now worried about 6. It is currently at 258 cycles and is rated as GOOD to PERFECT. Will it suffer the same fate as the 5? So, in other words, can I expect only another 200 cycles before the battery goes bad? Or does the 6 have a stronger battery than the 5? If so, how much stronger?

Answers

The battery starts to degrade from the very first time you charge it. It is supposed to maintain 80% charge for the 500 cycles. After that, it should be replaced. Individual batteries may vary. Three years for an iPhone battery is pretty good, in my opinion.
---
There's a factor that hasn't been mentioned. Batteries also degrade over time, independently of the number of charge cycles. My wife's 4S is over 4 years old, only has 170 full charge cycles (she doesn't use it much) and the battery capacity is 78%.

My iPhone  6, 2 years old, shows 468 cycles, capacity 95%.

On a totally different plane, my 2003 Prius, now 13 years old with 100,000 miles still shows battery capacity near its new value. Its traction battery is NiMH, not Lithium. That probably makes a difference.
---

Ref

https://discussions.apple.com/thread/7656542?start=0&tstart=0

The truth about iPhone battery lifespan (macworld)

One of the biggest knocks on the iPhone has been its battery. It’s not removable, which means — like an iPod’s battery — it will eventually run out of juice and need to be replaced.

Apple estimates that the iPhone will lose 20 percent of its capacity — a darn sight less than 100 percent — “after 400 full charge and discharge cycles.”

Apple’s iPhone battery page explains the rated life and lifespan of an iPhone battery, and also provides some helpful tips about how to extend battery life. For example, the page suggests that “for proper maintenance of a lithium-based battery, be sure to go through at least one [full] charge cycle per month.”

So let’s put this in perspective: if you completely drained your iPhone’s battery every day — which would be a whole lot of use, since Apple estimates the iPhone can offer up to 8 hours of talk time per charge — in about 13 months your battery would only hold 80 percent of its current charge.

https://www.apple.com/batteries/maximizing-performance/

Ref

https://www.macworld.com/article/1058916/smartphones/iphonebattery.html

BackupBot for iTunes: Backup Manager Software for iPad, iPhone and iPod Touch

Check iPad iPhone battery charge cycle count without jailbreaking

http://www.icopybot.com/blog/check-ipad-iphone-battery-charge-cycle-count-without-jailbreaking.htm

coconut Battery

http://www.coconut-flavour.com/coconutbattery/