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Hello.

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What we're going to do now
is we're going to do a quick battery test.

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Now, standard twelve volt battery,
we're looking for 2.1 volts per cell for a good battery.

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That is no guarantee, however, how your battery
is going to start your car on a cold morning.

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So what we're going to do is we're going to have a quick
look with the multimeter just to do a quick, basic test.

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And then we're going to use a heavy duty battery tester
to test for the reserve capacity.

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OK, so firstly, with the multimeter,
we have it on the direct voltage setting

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and then we're just going to basically
go across the two terminals to check.

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Red is positive, black is negative.

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Another way of telling the terminals apart is generally
the live

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terminal is large diameter than the Earth. OK,

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if you do put your meter on the wrong way round, basically
all you will get is you will get a negative reading.

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On your meter, say, -12 as opposed to positive 12.

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Ok, your meter is fused.

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It's not an issue if you get it the wrong way round.

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But if you do look at a reading and you wondering why
it's a minus voltage just check your polarities are right.

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OK, so for this purposes, we've got the battery on a bench.

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We're going to do a test on a brand new battery
to show a good result.

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And then in the next clip, we're going to show a test
on a battery that's got good voltage,

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but poor reserve capacity.

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OK, so with voltage test,
we make sure we've got good connection.

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We've got 12.64 volts.

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Ok so, excellent voltage.

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Nothing wrong with that at all.

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So if the customer complaint is that the vehicle won't start
when it's cold and they charge the battery or jump

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start it from another vehicle
and then it starts and it charges okay;

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then we can assume that the voltage is okay in the battery
and then we've got reserve capacity issue.

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So this battery is issued with an indicator in the top.

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If this indicator, when you inspect it shows green,
then it does

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mean the batteries in the charged state
and theoretically should be OK to use.

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OK, so we've got a good voltage on that

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so we can now turn this meter off
if we suspected the battery is a problem.

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We can now move over and we can use this tester.

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This tester will do a variety of tests,
which we'll go through in separate clips.

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But for this one, we're purely going to load
test the battery.

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Back in the day,
you'd actually put a load across the battery

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a physical meter
and then measure the discharge on the battery.

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The only problem with this is a repeated test
could permanently damage your battery.

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So now we use a light load tester,
which actually runs off the reserve capacity.

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OK, so connecting up
same again red positive, black to earth.

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OK, make sure we've got a good connection on here,

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any issues with this is now going to affect the readings
we're going to have off your tester.

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OK, so we've got two options with the tester.

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We've got battery location inside or outside the vehicle.

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That purely means is it wired to the vehicle
or is outside on a bench?

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If it's been charged, we need to let the battery settle
because it's a chemical reaction.

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It will slightly overcharge.

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Ok so as long as we've got 12.6 volts or below.

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We're all good to test from there,
so we can press enter on the tester now.

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application.

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We've got automotive, motorcycle or marine, for boats.

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Obviously, this is our car so we can just press enter.

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It's a standard type battery.

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OK, it's lead acid.

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It's a sealed unit. You can't top it up.

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The only thing to make sure when you install these is they
come with a transport plug pushed in the end of the vents.

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You need to remove that before
you install it on the vehicle to allow the battery to vent.

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OK. If you don't,
it would seriously reduce the life of your battery.

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OK, so we're on a standard battery.

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We'll cover AGM batteries there for stop/start
vehicles and hybrids.

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We'll cover that in another video on a hybrid vehicle,
and we'll test it on the vehicle to try it out.

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OK, so we go enter on there.

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Now, battery standards, we've got EN,
we've got DIN and we've got SAE.

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So there's all different capacities.

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If you look on your battery label,
it is quite clearly labeled

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this one EN in brackets and it's 640 amp battery.

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So we can now use that data to put into the machine.

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So if we enter on EN.

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And now it's coming up with a battery rating,
so use the up and down buttons,

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scrolls through quite quickly this one,

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so we go down to 640 amps.

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So that is now matching that figure there.

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We can now press enter and start the test.

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We don't need to do anything else
the machine will do the test all by itself

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and come up with the result.

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And it's literally that quick.

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OK, so it's telling me we've got 12.6 volts.

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It's measured at 671 amps.

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And the rating is 640.

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So we know this battery is fully charged and it's actually
got slightly above standard reserve capacity.

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So that's good.

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We can now reinstall it on the vehicle and then we can reset

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all the radio codes in the electric windows
and then this vehicle is ready to use.