5 ms·
Wrong. The peak demand from the phone can exceed the available voltage even if you're at 30%, causing an immediate shutdown. That's what we saw a year ago. Now
by jtbayly 9y ago
Wrong. The peak demand from the phone can exceed the available voltage even if you're at 30%, causing an immediate shutdown. That's what we saw a year ago. Now they no longer shut down unexpectedly, but the performance of the phone sucks, even with a battery that holds 87% of its original capacity.
- jlmorton 9y agoI don't dispute that, but that does not explain the observations that a fully-charged, reduced-capacity battery performs poorly on a standard benchmark test versus a new battery. It's not just smoothing out a peak demand. It's reducing the peak performance all of the time, and that is unique to iPhone.
- unobtaniumstool 9y agoThat's not entirely accurate. They observed that with a fully charged battery it performed as expected. The CPU wasn't throttled until the battery was depleted.
- jtbayly 9y agoThat's not my experience. Unless depleted means 95% charged and 87% capacity compared to original spec. Mine runs at 50% CPU speed under those circumstances. I wouldn't call that "performing as expected."
- esmi 9y agoYou're assuming the issue is only changing capacity vs age. Internal impedance increases with age as well. A full battery that can't source its energy in a timely manner might as well be empty.
- ric2b 9y ago> The peak demand from the phone can exceed the available voltage even if you're at 30% So throw in a fat capacitor. This was a solved problem 50 years ago, the only problem is this constant rush to make phones 1% thinner. I've never met anyone that used phone thinness as a metric when choosing a new phone and yet here we are.