Older batteries simply can't provide as much power as new ones.
Not exact matches
If it doesn't, on
older cars, you can
simply unplug the + connector from the
battery.
Because the Pi is a micro computer and not
simply a cellphone getting a
battery topped off, you need to use a high quality charger with stable power delivery that provides a consistent 5v with at least 700mA minimum output for
older model units and 2.5 A for the Pi 3.
Unfortunately,
battery apps
simply aren't reliable in reporting the health of your
older iPhone's
battery.
If you have an
older iPhone, you can significantly speed it up
simply by swapping out the
old battery for a new one.
Did Apple's iOS update that «fixed» the matter
simply do so by dynamically throttling the phones» clock speeds to reduce stress on
older batteries, thus making them less likely to shut down from excess power draw?
While Apple does not refute what was found, it says that the reason for the power management and CPU throttling results identified by Poole and other Geekbench users is
simply a case of it trying to smooth out high peaks of power draw in an attempt to prevent iPhones with
older batteries from shutting down unexpectedly.
The user has the option of using Quick Charge 3.0 for a fast charge, or you can
simply replace the
old battery with a new one.