iPhone 6(S)/Plus iPhone throttling as battery discharges

[bodonnell202]

I started noticing that my iPhone gradually gets slower as the battery discharges so I decided to run Geekbench as several points throughout the day as the battery discharged and the results are very interesting. Seems my iPhone only has full performance above about 85%. I didn’t go all the way down to 20% (since I rarely run my battery that low) but I can say at that charge state my phone becomes very sluggish and practically unusable.

A little history, my iPhone 6s received a free replacement battery from Apple about a year ago thanks to the iPhone 6s battery replacement program, so while it is middle aged at this point, it’s health would still be considered good by Apple and it’s not in the old, 500+ cycles that people generally seem to talk about with respect to iPhone throttling. Makes me wonder if new iPhones 6s’ are throttled right out of the box now.

What are other people’s experience?

 

[newellj]

Other people have reported the same. On the other hand, I ran GB4 on my iPhone 7 from the high 80s% down to 17% and never saw a change in the GB4 CPU benchmark. Not sure what explains that difference.

 

[Newtons Apple]

Reading reports that Apple will be giving us a "toggle" to turn this throttling on and off in the next iOS update!

 

[BrianBaughn]

Get the "Lirum Device Info Lite" app and see what the CPU Actual Clock speed is reporting.

 

[bodonnell202]

Other people have reported the same. On the other hand, I ran GB4 on my iPhone 7 from the high 80s% down to 17% and never saw a change in the GB4 CPU benchmark. Not sure what explains that difference.

Hmmm, I'm assuming your 7 is running the latest iOS and is around/a little over a year old (and therefore has a battery around the same age as the one in my 6s)? Perhaps the somewhat larger battery of the 7 ages a little more gracefully and/or the throttling algorithms aren't as aggressive on the 7.
[doublepost=1516294883][/doublepost]

Reading reports that Apple will be giving us a "toggle" to turn this throttling on and off in the next iOS update!

Honestly, I'd be ok if this "feature" actually worked as advertised and throttled my phone when the battery is getting low to prevent shutdowns (my phone still usually shuts down at around 15% anyway). I think their algorithms are a little aggressive at this point.
[doublepost=1516295202][/doublepost]

Get the "Lirum Device Info Lite" app and see what the CPU Actual Clock speed is reporting.

I've checked it previously in CPU Dasher and the steps seem to be (corresponding to the above GB scores):
-1848 MHz (full speed)
-1511 MHz
-1200 MHz
-911 Mhz (this one seems overly low for the last GB run though, as I would expect an even lower GB score if the CPU was actually operating at this frequency).