All language subtitles for 7_Batteries Charging Systems

Sometimes instead of being

plugged into a power
outlet all the time,

we want to take our
technology with us.

Mobile technology uses
rechargeable batteries to

carry power with the device
wherever we take it.

Rechargeable devices might have

an external charger for
removable batteries,

or might have a cradle
stand or wireless charger.

Look at this phone, we can
top up the battery just by

laying it on this wireless
inductive charging pad.

Isn't that cool? It's also
pretty clever technology.

Rechargeable batteries
have a limited lifespan,

which is measured
in charge cycles.

A charge cycle is

one full charge and
discharge of a battery.

When a battery is reaching
the end of its lifespan,

it may take longer to charge and

might not hold as much
charge as when it was new.

For some devices, you compare
the current cycle count of

your battery with the rate at

cycle count of
that battery type,

to see how much more life
to expect out of it.

You need an external
power source

to add power to a battery.

This could come
from a wall outlet,

another battery, or
even a solar panel.

You also need a charging
circuit that manages

the power transfer from

the external power source to
the rechargeable battery.

This circuit works a lot like

a power supply unit or PSU
that we looked at earlier.

It makes sure the input power is

converted to the
correct output power.

Instead of using a large PSU,

rechargeable devices use more
portable power adapters,

power supplies or chargers.

A portable power supply powers

the device while also
charging the battery.

This might sound obvious,

but you need to make
sure that you use

the right charger for
the right device.

Mismatching chargers to devices
can damage the battery,

the device and the charger.

A lot of chargers and power
supplies use USB connectors,

but you'll see a wide variety
of charging connectors.

Rechargeable batteries
can be damaged by

very cold or very
hot environments.

Don't charge or discharge
rechargeable batteries unless

they're within their safe
operating temperature range.

Its not just that a damaged
rechargeable battery

might not perform well,

it can also be very dangerous.

Batteries can swell, rupture,

and sometimes even catch fire.

Before working with
a damaged battery,

you should know how
to safely handle it.

When a battery reaches
the end of its life,

you'll need to replace it.

Some devices will slow
themselves down when

a battery is getting old to
make the battery last longer.

If your device is
running much slower than

usual or shutting
down unexpectedly,

one thing to check
is the battery life.

Some devices have
batteries that are

designed to be replaced
by the end-user.

Other devices have batteries

that are very
difficult to replace,

like small laptops
and mobile devices.

As an IT support specialist,

you might receive special
training on how to

replace batteries and
devices that you support.

Or you might be the person
sending the device out for

battery replacement and then

returning the device
to the end-user.

IT support specialist
often have to

troubleshoot battery life
and device charging.

The first step is to
make sure the charger,

the battery and the device are

all designed to work
with each other.

We'll talk about sending
out devices for repair and

troubleshooting skills in
future videos, so stay tuned.

For iOS and Android,

there are also some things
that you could do to make

the battery last as
long as possible.

It's a good idea for you to be

familiar with these things
so that you can help

educate end-users
on the best ways

to get the most out of
their mobile devices.